Add tempest element

Currently runs about 1300 tests, all pass (about 800 are filtered out,
some of which would pass if the filters were made more granular).

Co-Authored-By: Ben Nemec<bnemec@redhat.com>

Change-Id: I34b0213724669b0fb39ce75e7612e51ab176d1dd
Use bash in mysql element install script.

We now call the mysql element's install.d script with bash, since it is
using non-POSIX shell features (specifically, [[ and regex matching).

Change-Id: I8cc22dbe2df9c30925cb9dfd850bbe3d06f30f2a
Merge "Add tempest element"
Merge "Use bash in mysql element install script."
Restrict mode of os-collect-config.conf

This file contains various access codes and shouldn't be world readable.

Change-Id: I1dbd5c3780e42531580833f2f4e0332f18702282
Merge "Restrict mode of os-collect-config.conf"