[deployer] Use openstack_cpi 0.0.6 gem

Change-Id: I7a705d0fb83ceb2e54d09e9bd085c62fb3c1452a
[deployer] Fix undefined method `green' for nil:NilClass

Fix undefined method `green' for nil:NilClass

Change-Id: I442c59613d4a77669dbab8ca700b46101a09b439
Merge "[deployer] Use openstack_cpi 0.0.6 gem"