In order to optimize resources on labs we can use yaml
template for devops environment. Typically we deploy
env with 3 controllers and several other nodes with
vmware-related roles. Controller nodes use more
resources than other nodes, so we can set different
memory size and amount of cpu for different nodes to
optimize resource utilization.
Change-Id: I492c74aea6696de11ea1871e9a026f74e1873981
Closes-bug: #1616476
4aff48d79f