Duplicate entries in the RHEVM UI

Issue

After the /var filesystem became full or corrupted, the low-level postgres DB was corrupted and allowed duplicate entries into a table that should have been protected by a primary key constraint. This problem will manifest itself in several different ways, including:

• Duplicate entries in the UI - When the duplicate is something that you can click on via the UI, you will notice that all instances if the duplicate are highlighted
• Odd behavior in the UI - Apart from item duplication, other actions using the UI do not perform as expected (migrations, for example, have no "OK" or "Cancel" buttons).
• Differing row counts between select count(<primary_key>) and select count(DISTINCT <primary_Key>) in the engine database