Comment 12 for bug 1540374

Verified on MOS 8.0 + mu2 updates.

Used scenario:
1) Create simple cluster(controller+compute+cinder)
2) Upload network template to master node http://paste.openstack.org/show/492250/ (update interfaces names)
3) fuel network-template --env X --upload
4) fuel --env X deployment default
5) Check that transformation's order corresponds priority for node roles. Change priority and check that transormations also changes.