Add links to /catalog to see Thrift structure of tables and databases

Also a fix for the catalog objects path handler when the object type was
lower case.

Change-Id: I25b275e0f95c71b2c429262ff205d81003b92061
Reviewed-on: http://gerrit.ent.cloudera.com:8080/1265
Reviewed-by: Lenni Kuff <lskuff@cloudera.com>
Tested-by: jenkins