Add some handling for ObjectCustomFieldValues to rt-validator

[dmsimard]

There are no real verifications about ObjectCustomFieldValues dependancies and relations. This aims to improve it a little bit. Ref: http://lists.bestpractical.com/pipermail/rt-users/2013-August/081425.html

[ruz]

Correct direction. Commit messages are too long, use one short line, empty line and description as long as you like, for example "delete OCFV records pointing at not existing object" for 30a401d and describe further in the description.

The following command is your friend, allows to change history:

git checkout -b tmp git rebase -i 2549ff0^