Allow int version numbers in the clouds.yaml
Allow int version numbers in the clouds.yaml

OSC blows up if you try to use for example identity_api_version: 2
in the clouds.yaml.  It will only work with a string '2'.  This
fixes that.

Change-Id: I785d37a288126a1582464e907c7f9c9947bac27c

dtroyer/osc-lib