Changes for DatabaseMetaData compat testing.

DERBY-6000 Changed Types for getIndexInfo CARDINALITY and PAGES.
Should have a release note.

Also remove non-stable checks:  explicit checks on system tables and 
exact column checks.



git-svn-id: https://svn.apache.org/repos/asf/db/derby/code/branches/10.8.3.1_testcompat@1468236 13f79535-47bb-0310-9956-ffa450edef68