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/web/scripts/solr/NodeContentGet.java

@@ -37,6 +37,7 @@ import org.alfresco.model.ContentModel;
 import org.alfresco.repo.content.MimetypeMap;
 import org.alfresco.repo.content.transform.ContentTransformer;
 import org.alfresco.repo.content.transform.TransformerDebug;
+import org.alfresco.repo.content.transform.UnsupportedTransformationException;
 import org.alfresco.repo.domain.node.NodeDAO;
 import org.alfresco.repo.web.scripts.content.StreamContent;
 import org.alfresco.service.cmr.repository.ContentIOException;
@@ -214,7 +215,7 @@ public class NodeContentGet extends StreamContent
                 long transformDuration = System.currentTimeMillis() - start;
                 res.setHeader(TRANSFORM_DURATION_HEADER, String.valueOf(transformDuration));
             }
-            catch (ContentIOException e)
+            catch (ContentIOException|UnsupportedTransformationException e)
             {
                 transformException = e;
             }