ENG-6926 Update Volt extensions to HSQL parser to be more selective when determining referent of SIMPLE_COLUMN.

(cherry picked from commit a064049608d343e096c1534bbb394585ce2cb9c4)

Conflicts:
	tests/frontend/org/voltdb_testprocs/regressionsuites/fixedsql/fixed-sql-ddl.sql
Remove comment I made that I now think is incorrect.

(cherry picked from commit fa0710a81d4ea865c4fce8ba3ecbcb138f789e6a)
Fix partition table statement in fixed-sql ddl

(cherry picked from commit 85098ac66d0742b7aebb94e4a1f7dce6f1e33103)