Use tox for bashate testing

This adds a tox.ini file, which follows the same setting with devstack.

Change-Id: Ic9812d1787cfa3a580d9ba60ca701338a66b572b

.gitignore

@@ -1 +1,2 @@
 *~
+.tox

tox.ini

@@ -0,0 +1,25 @@
+[tox]
+minversion = 1.6
+skipsdist = True
+envlist = bashate
+
+[testenv]
+usedevelop = False
+install_command = pip install {opts} {packages}
+
+[testenv:bashate]
+deps = bashate
+whitelist_externals = bash
+commands = bash -c "find {toxinidir}          \
+         -not \( -type d -name .?\* -prune \) \ # prune all 'dot' dirs
+         -not \( -type d -name doc -prune \)  \ # skip documentation
+         -type f                              \ # only files
+         -not -name \*~                       \ # skip editors, readme, etc
+         -not -name \*.md                     \
+         \(                                   \
+          -name \*.sh -or                     \
+          -name \*rc -or                      \
+          -name functions\* -or               \
+          -wholename \*/lib/\*                \ # /lib files are shell, but
+         \)                                   \ #   have no extension
+         -print0 | xargs -0 bashate -v"