Update metadata for 0.7.0 release (#69)

Couple of new features:

- Ability to set region name
- Ability to skip user creation

Author: jovial

galaxy.yml

@@ -1,7 +1,7 @@
 ---
 namespace: stackhpc
 name: openstack
-version: 0.6.0
+version: 0.7.0
 readme: README.md
 authors:
   - StackHPC Ltd