Merge pull request #9 from michalskalski/master

Restart occamengine on the end of update_code task
added two new parameters to example zone files: swift and glance_backend
Merge pull request #10 from pmisiak/master

added two new parameters to example zone files: swift and glance_backend
Prevent assigning IP address from vm_network pool to mgmt interface.

In provisioning process new node get IP address equal to last assigned
address + 1. Before get last assigned IP we must filter out addresses
from vm_network pool to not choose one of it as a base for
calculation of IP address reservation for mgmt interface of new node.