Clean-up sanity checks done via shell scripts

Move the various checks done via shell into a single file;
this is cleaner and we'll have a lot more space to explain
what is going on.

Related-bug: #1404605

Change-Id: Ibb451c6a25217f37b73983c30891f55b35f143cd
Merge "Clean-up sanity checks done via shell scripts"
Merge branch 'master' of https://github.com/openstack/quantum