Restore CentOS support enforcing 7.0
Merge pull request #271 from ares/master

Restore CentOS support enforcing 7.0
Version bump
bz 1126072: deploy one compute host, then the rest

This requires a db migration and then re-running seed data before
testing the change
missed the migration in the initial commit
Fix autoreload issues in development mode
"first compute alone" functionality is only needed for nova
Merge pull request #273 from sseago/compute-deploy-sequence

bz 1126072: deploy one compute host, then the rest
Merge pull request #274 from ares/master

Fix autoreload issues in development mode
Add networking configuration step
Create network types for all layouts
Subnet types assignment to subnets
Deployment validation
Hosts view refactoring
Assign subnet types to subnet as a second wizard step
Fix after refactoring - squash
NIC assignment to subnets
Fix rebase errors
Assignment is reachable from deployment
Display warning when touching subnets

If subnet has been already assigned to NIC in particular deployment
we display warning flash.