DERBY-4160: getMetaData().getIndexInfo crashes with "ERROR X0Y68: Column 'PARAM1' already exists."

Merged revision 1570488 from trunk.


git-svn-id: https://svn.apache.org/repos/asf/db/derby/code/branches/10.10@1574389 13f79535-47bb-0310-9956-ffa450edef68