Revert "Revert "Temporarily stop running tripleo seed/undercloud""

This reverts commit 084f24b3fc94312c420743b3e5aaa7b5e5c29ea3.

The tripleo cloud was down again.  Remove jobs that require it
until it is more stable, we are better able to handle a lack of
stability from cloud providers, and we are outside of the i3
rush.

Change-Id: Idde131380284fcb905241559b08691456310092a