Initial add of compatibility issues file.
Initial add of compatibility issues file.

cristian-t/DatabaseCompatibilityTest,ibm-informix/DatabaseCompatibilityTest,cristian-t/DatabaseCompatibilityTest,cristian-t/DatabaseCompatibilityTest,ibm-informix/DatabaseCompatibilityTest,cristian-t/DatabaseCompatibilityTest,ibm-informix/DatabaseCompatibilityTest,ibm-informix/DatabaseCompatibilityTest,cristian-t/DatabaseCompatibilityTest