Added a raw download servlet at URL http://.../alfresco/dr?contentUrl=...?ticket=...

Added ContentService.getRawReader to get content directly using a content URL.  To access this, you need to be admin.
Fixed EHCacheAdapter to handle non-Serializable values.
Added tests for above and for AbstractRoutingContentStore.


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@5841 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/cache/EhCacheAdapter.java

@@ -87,7 +87,7 @@ public class EhCacheAdapter<K extends Serializable, V extends Object>
             Element element = cache.get(key);
             if (element != null)
             {
-                return (V) element.getValue();
+                return (V) element.getObjectValue();
             }
             else
             {
@@ -97,7 +97,8 @@ public class EhCacheAdapter<K extends Serializable, V extends Object>
         catch (CacheException e)
         {
             throw new AlfrescoRuntimeException("Failed to get from EhCache: \n" +
-                    "   key: " + key);
+                    "   key: " + key,
+                    e);
         }
     }