Enable running all tests via "installcheck"

NOTE: also makes CDB_TableMetadata triggers still functional
      when user quota and varnish invalidation functions are missing
      from the database (currently installed by cartodb ruby)

scripts-available/CDB_UserTables.sql

@@ -22,7 +22,7 @@ AS $$
       'spatial_ref_sys'
      )
   ), perms AS (
-    SELECT t, has_table_privilege('publicuser', 'public.'||t, 'SELECT') as p
+    SELECT t, has_table_privilege('publicuser', t, 'SELECT') as p
     FROM usertables
   )
   SELECT t FROM perms