My repository contained .test directory from different tests and
that failed the bashate test, exclude it from bashate checks so
that tox -e bashate works locally.
Change-Id: I99c531d425cfc4464ec7461b339fd0b40ce13148
Also create tools/run-bashate.sh to wrap a find command to search for
files to run bashate on, and use it in tox.
Change-Id: I5ab07425f566a556f158a4b76b00aa35f9fb4385