Remove submodule openstack_modules
Squashed 'openstack_modules/' content from commit 7f08c12

git-subtree-dir: openstack_modules
git-subtree-split: 7f08c122f415cb759ce0518bf6df12c2787b64ad
Merge commit 'b1e8f278f554a4255d31d4fcf13e7537d7310d5a' as 'openstack_modules'