JSF throws ClassNotFoundException for o.a.m.el.convert.ValueExpressionToValueBinding

[wtlucy]

Describe the bug
A JSF application using jsf-2.2 or jsf-2.3 can encounter a ClassNotFoundException for the internal MyFaces class ValueExpressionToValueBinding, even if that class isn't directly referenced by the app. This issue occurs because the org.apache.myfaces.el.convert package is not currently made available (by Liberty's jsf-2.2 and jsf-2.3 bundles) to the thread context classloader.

[ERROR   ] SRVE0315E: An exception occurred: java.lang.Throwable: javax.servlet.ServletException: org.apache.myfaces.el.convert.ValueExpressionToValueBinding
        at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:5119)
        at [internal classes]
Caused by: javax.servlet.ServletException: org.apache.myfaces.el.convert.ValueExpressionToValueBinding
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:230)
        ... 1 more
Caused by: java.lang.ClassNotFoundException: org.apache.myfaces.el.convert.ValueExpressionToValueBinding
        at java.lang.Class.forNameImpl(Native Method)
        at java.lang.Class.forName(Class.java:407)
        at javax.faces.component._ClassUtils.classForName(_ClassUtils.java:145)
        ... 1 more

Steps to Reproduce
Applications with custom tags using Application.createValueBinding(String) deployed with jsf-2.2 or jsf-2.3can hit this:

@FacesComponent(tagName = "valueBindingTag", createTag=true, namespace="http://openliberty.io/jsf")
public class ValueBindingTag extends UIComponentBase {
...
    @Override
    public void encodeBegin(FacesContext context) throws IOException {
        ValueBinding test = getFacesContext().getApplication().createValueBinding("test"); // CNFE here
        this.setValueBinding("test", test);
    }
...

Expected behavior
This ClassNotFoundException should not be thrown

Diagnostic information:

• OpenLiberty Version: [e.g. 21.0.0.8 - 21.0.0.10]
• Affected feature(s) jsf-2.2, jsf-2.3

Additional context
N/A

[mbroz2]

@wtlucy please update the description of this release bug so that it follows/conforms to the Bug report template