xlsx file can't be opened in Office 365 after save

[andreysubbotin]

Test case:

• Create an XLSX file using Office 365
• Load -> save file.

        SpreadsheetMLPackage template =
                SpreadsheetMLPackage.load(Thread.currentThread().getContextClassLoader().getResourceAsStream("template.xlsx"));
        RelationshipsPart rp = template.getRelationshipsPart();
        for (Relationship r : rp.getRelationships().getRelationship()) {
            Part part = rp.getPart(r);
            if (part instanceof JaxbXmlPart) {
                try {
                    ((JaxbXmlPart) part).getContents();
                } catch (Docx4JException e) {
                    throw new RuntimeException("Unable to get part contents", e);
                }
            }
        }

        Save saver = new Save(template);
        saver.save(new FileOutputStream("test_1.xlsx"));

• Try to open saved file. File can't be opened in Office 365.
  Test project (run Main class and try to open generated test_1.xlsxin the project root)
  doc4j_test.zip
• Error in logs:

[main] WARN org.docx4j.mce.ArrayListMce - com.sun.org.apache.xerces.internal.dom.ElementNSImpl does not implement Child
[main] WARN org.docx4j.jaxb.JaxbValidationEventHandler - [ERROR] : unexpected element (uri:"http://schemas.microsoft.com/office/spreadsheetml/2014/revision", local:"revisionPtr"). Expecte
[main] WARN org.docx4j.jaxb.JaxbValidationEventHandler - Column is 1242 at line number 2
[main] INFO org.docx4j.jaxb.JaxbValidationEventHandler - shouldContinue is set to false
[main] WARN org.docx4j.openpackaging.parts.JaxbXmlPartXPathAware - unexpected element (uri:"http://schemas.microsoft.com/office/spreadsheetml/2014/revision", local:"revisionPtr"). Expected elements are <{http://schemas.openxmlformats.org/spreadsheetml/2006/main}oleSize>,<{http://schemas.openxmlformats.org/spreadsheetml/2006/main}functionGroups>,<{http://schemas.openxmlformats.org/spreadsheetml/2006/main}fileVersion>,<{http://schemas.openxmlformats.org/spreadsheetml/2006/main}fileSharing>,<{http://schemas.openxmlformats.org/markup-compatibility/2006}AlternateContent>,<{http://schemas.openxmlformats.org/spreadsheetml/2006/main}pivotCaches>,<{http://schemas.openxmlformats.org/spreadsheetml/2006/main}definedNames>,<{http://schemas.openxmlformats.org/spreadsheetml/2006/main}sheets>,<{http://schemas.openxmlformats.org/spreadsheetml/2006/main}smartTagTypes>,<{http://schemas.openxmlformats.org/spreadsheetml/2006/main}calcPr>,<{http://schemas.openxmlformats.org/spreadsheetml/2006/main}customWorkbookViews>,<{http://schemas.openxmlformats.org/spreadsheetml/2006/main}webPublishing>,<{http://schemas.openxmlformats.org/spreadsheetml/2006/main}webPublishObjects>,<{http://schemas.openxmlformats.org/spreadsheetml/2006/main}smartTagPr>,<{http://schemas.openxmlformats.org/spreadsheetml/2006/main}workbookProtection>,<{http://schemas.openxmlformats.org/spreadsheetml/2006/main}bookViews>,<{http://schemas.openxmlformats.org/spreadsheetml/2006/main}extLst>,<{http://schemas.openxmlformats.org/spreadsheetml/2006/main}workbookPr>,<{http://schemas.openxmlformats.org/spreadsheetml/2006/main}fileRecoveryPr>,<{http://schemas.openxmlformats.org/spreadsheetml/2006/main}externalReferences>
[main] INFO org.docx4j.openpackaging.parts.JaxbXmlPartXPathAware - encountered unexpected content in /xl/workbook.xml; pre-processing
[main] INFO org.docx4j.XmlUtils - Using org.docx4j.org.apache.xalan.transformer.TransformerImpl
[main] WARN org.docx4j.utils.XSLTUtils - Found some mc:AlternateContent
[main] WARN org.docx4j.utils.XSLTUtils - Missing mc:Fallback!  Dropping the mc:AlternateContent entirely.
[main] WARN org.docx4j.jaxb.JaxbValidationEventHandler - [ERROR] : unexpected element (uri:"http://schemas.microsoft.com/office/spreadsheetml/2014/revision", local:"revisionPtr"). Expecte
[main] WARN org.docx4j.jaxb.JaxbValidationEventHandler - troublesome node: <xr:revisionPtr xmlns:xr="http://schemas.microsoft.com/office/spreadsheetml/2014/revision" xmlns:xr10="http://schemas.microsoft.com/office/spreadsheetml/2016/revision10" xmlns:xr6="http://schemas.microsoft.com/office/spreadsheetml/2016/revision6" documentId="13_ncr:1_{90072CB2-1B60-4A41-A963-BAA5AC795DCA}" revIDLastSave="0" xr10:uidLastSave="{00000000-0000-0000-0000-000000000000}" xr6:coauthVersionLast="44" xr6:coauthVersionMax="44"/>
[main] WARN org.docx4j.jaxb.JaxbValidationEventHandler - in parent node: <workbook xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" xmlns:x15="http://schemas.microsoft.com/office/spreadsheetml/2010/11/main" xmlns:xr="http://schemas.microsoft.com/office/spreadsheetml/2014/revision" xmlns:xr10="http://schemas.microsoft.com/office/spreadsheetml/2016/revision10" xmlns:xr2="http://schemas.microsoft.com/office/spreadsheetml/2015/revision2" xmlns:xr6="http://schemas.microsoft.com/office/spreadsheetml/2016/revision6" mc:Ignorable="x15 xr xr6 xr10 xr2"><fileVersion appName="xl" lastEdited="7" lowestEdited="7" rupBuild="21929"/><workbookPr defaultThemeVersion="166925"/><xr:revisionPtr documentId="13_ncr:1_{90072CB2-1B60-4A41-A963-BAA5AC795DCA}" revIDLastSave="0" xr10:uidLastSave="{00000000-0000-0000-0000-000000000000}" xr6:coauthVersionLast="44" xr6:coauthVersionMax="44"/><bookViews><workbookView windowHeight="15840" windowWidth="29040" xWindow="-120" xr2:uid="{00000000-000D-0000-FFFF-FFFF00000000}" yWindow="-120"/></bookViews><sheets><sheet name="Sheet1" r:id="rId1" sheetId="1"/></sheets><definedNames><definedName name="NewEntity">Sheet1!$A$1:$B$2</definedName></definedNames><calcPr calcId="0"/></workbook>
[main] WARN org.docx4j.jaxb.JaxbValidationEventHandler - #document/workbook/revisionPtr
[main] INFO org.docx4j.jaxb.JaxbValidationEventHandler - continuing (with possible element/attribute loss)
[main] INFO org.docx4j.jaxb.NamespacePrefixMapperUtils - Using ri.NamespacePrefixMapper, which is suitable for the JAXB RI
[main] INFO org.docx4j.jaxb.NamespacePrefixMapperUtils - Using ri.NamespacePrefixMapperRelationshipsPart, which is suitable for the JAXB RI
[main] WARN org.docx4j.jaxb.NamespacePrefixMapperUtils - No mapping for prefix 'xr'
[main] WARN org.docx4j.jaxb.NamespacePrefixMapperUtils - No mapping for prefix 'xr6'
[main] WARN org.docx4j.jaxb.NamespacePrefixMapperUtils - No mapping for prefix 'xr10'
[main] WARN org.docx4j.jaxb.NamespacePrefixMapperUtils - No mapping for prefix 'xr2'

[plutext]

docx4j 8.1.6 contains this fix.