Script to clone domain wasn't waiting for db

In certain circumstances, the database was not ready when the clone
domain was requested. To combat this we now:

* Run a postgres test for the time to ensure connections are allowed
* Tie this into a wait_for with a nominal 300s timeout
Merge pull request #1155 from psav/docker_bot_req

Docker bot now updates pip on it's own
Merge pull request #1154 from psav/fix_db_wait

Script to clone domain wasn't waiting for db
allow overwrite when re-trying vsphere template upload
Merge pull request #1159 from dajohnso/uploader_tweaks

allow overwrite when re-trying vsphere template upload
Added new API call
Merge pull request #1163 from psav/add_tracker_bot

Added new API call
check_prs migration very broken