DERBY-4753: "ERROR 42X01: Syntax error: FALSE." during call to java.sql.DatabaseMetaData.getIndexInfo

When recompiling a meta-data query after detecting that its plan is
stale, pass down a flag to the compiler to say that it's a meta-data
query and that use of internal syntax is allowed.

git-svn-id: https://svn.apache.org/repos/asf/db/derby/code/trunk@1570490 13f79535-47bb-0310-9956-ffa450edef68