* Remove tests and tools directories since openstack-specs-jobs runs
only docs
* Remove .testr.conf as there are will be no tests directory present in
this repository after this change and update .gitignore accordingly
* Use 3.18.0 as the minversion for tox in order to use
allowlist_externals option
Signed-off-by: HeroicHitesh <email.hiteshkumar@gmail.com>
Change-Id: I345f16d0956b8e397b282902a211159e11f902c8