Fix issue with incorrect determination of whether or not a string is encoded

by replacing URLDecoder with import org.springframework.web.util.UriUtils
as the former does not handle '+' character.

    Ticket: #8356
    Acked-by: Albert Rossi <arossi@fnal.gov>
    Target: trunk
    Request: 2.9
    Request: 2.8
    Request: 2.7
    Request: 2.6
    Require-book: no
    Require-notes: yes

RELEASE NOTES

Fix bug effecting ability to stage files from Enstore if file names
contain '+' character.
(cherry picked from commit d12513c)

Conflicts:
	modules/dcache-chimera/src/main/java/org/dcache/chimera/namespace/ChimeraEnstoreStorageInfoExtractor.java

Author: DmitryLitvintsev

modules/dcache-chimera/src/main/java/org/dcache/chimera/namespace/ChimeraEnstoreStorageInfoExtractor.java

@@ -1,12 +1,11 @@
 package org.dcache.chimera.namespace;
 
 import org.springframework.web.util.UriComponentsBuilder;
-import org.springframework.web.util.UriComponents;
+import org.springframework.web.util.UriUtils;
 
 import java.io.IOException;
 import java.io.UnsupportedEncodingException;
 import java.net.URI;
-import java.net.URLDecoder;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -127,6 +126,6 @@ public StorageInfo getDirStorageInfo(FsInode inode) throws CacheException {
     }
 
     private static boolean isEncoded(String s) throws UnsupportedEncodingException {
-        return !s.equals(URLDecoder.decode(s,"UTF-8"));
+        return !s.equals(UriUtils.decode(s,"UTF-8"));
     }
 }