Revert "Removed faulty tests for Ingres."

This reverts commit 8c41b8f66b5f2cf5ec1e2292732895df463fcd2e.
Revert "Added support for skipping modules for multi-module projects."

This reverts commit d9d4c3431fbc2f556ed12cdee19ffec6a6aa3d9b.
Revert "More Ingres SQL fixes."

This reverts commit 21a82d4fed87068d934698046f548b790f603758.
Revert "Fixed Ingres SQL to CURRENT_TIMESTAMP"

This reverts commit a022b0c9385ff1b6be055bf71cb84001e430139b.
Revert "Tests fixed for Ingres."

This reverts commit 4bd82107bb3160589345eab3c23ffe902e6b8b31.
Revert "Cloned the PostgreSQL tests to Ingres tests."

This reverts commit e8e19009a4506d4d9ae1167c9f43fa7671ab1c6b.
Revert "More Ingres support coded. Removed non-existing functionality."

This reverts commit 1f99a79581916c74f8bc5ca054628479a5af63d4.
Revert "More Ingres schema support coded. Removed unnecessary functionality."

This reverts commit 67d8fe30adcff5e6f02ae4db72b401dae424f9c8.
Revert "Cloned PostgreSQL support for Ingres. Changed the schema exists function to query user names, as is proper for Ingres. Updated the JDBC driver versions."

This reverts commit 86ebe5d3de9954a99279911431c2a5ec6379d00e.