Revert "Skip since this test always fails with Oracle 12c"

This reverts commit 73ba558a3897dfd4bf6e1351489dbccd926ddc81.
Merge pull request #465 from yahonda/revert_73ba558a_ora12014

Revert "Skip since this test always fails with Oracle 12c"
Revert "Pending two tests which always fail when tested with Oracle 12c"

This reverts commit 346435b710091439a0f473f42be9772c944ee9d6.
Merge pull request #467 from yahonda/revert_346435b7

Revert "Pending two tests which always fail when tested with Oracle 12c"