MNT-16381 Transformers must validate the content stream mimetype

- Addition of AbstractContentTransformer2.strictMimeTypeCheck(...) to check that the
     declared mimetype is the same as the Tika derived mimetype. Controlled by a new alfresco
     global property content.transformer.strict.mimetype.check (set to true by default).
   - Added the UnsupportedTransformationException to a number of transformation callers as
     they should have been handling it already.
   - Modified DifferrentMimeTypeTest to test the new strictMimeTypeCheck.

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/BRANCHES/DEV/5.2.N/root@128168 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/template/BaseContentNode.java

@@ -34,10 +34,9 @@ import java.util.Set;
 import org.alfresco.model.ApplicationModel;
 import org.alfresco.model.ContentModel;
 import org.alfresco.repo.content.MimetypeMap;
+import org.alfresco.repo.content.transform.UnsupportedTransformationException;
 import org.alfresco.service.ServiceRegistry;
 import org.alfresco.service.cmr.dictionary.DictionaryService;
-import org.alfresco.service.cmr.model.FileInfo;
-import org.alfresco.service.cmr.model.FileNotFoundException;
 import org.alfresco.service.cmr.repository.ChildAssociationRef;
 import org.alfresco.service.cmr.repository.ContentData;
 import org.alfresco.service.cmr.repository.ContentReader;
@@ -635,7 +634,7 @@ public abstract class BaseContentNode implements TemplateContent
                        }
                     }
                 }
-                catch (NoTransformerException e)
+                catch (NoTransformerException|UnsupportedTransformationException e)
                 {
                     // ignore
                 }