resource quota models moved to iaas application (nc-218)
quotas fields in project serializer were rewrited (nc-218)
cloud_project_membership represented as one to one field in quotas models (nc-218)
quotas stats moved to iaas application (nc-218)
pull quota openstack methods (nc-218)
tests fro pull quota openstack methods (nc-218)
backup storage field initiation and test for it (nc-218)
commented code removed (nc-218)
storage has to be stored in mb not gb (nc-218)
pull resource quota methods added to pull cloud memership task (nc-218)
test corrected (nc-218)
Merge branch 'develop' of code.opennodecloud.com:nodeconductor/nodeconductor into feature/nc-218
six.reraise corrected (nc-218)
Merge branch 'develop' of code.opennodecloud.com:nodeconductor/nodeconductor into feature/nc-218
Merge branch 'feature/nc-218' into 'develop'

Feature/nc 218 (pull quotas)

Resource quotas tables and quota usage stats moved to 'iaas' application.
Quotas pull methods added to openstack backend.
Updated bootstrap script for CentOS 7
sample data creation corrected (nc-218)
Merge branch 'develop' of code.opennodecloud.com:nodeconductor/nodeconductor into feature/nc-218