Update restful api deploy_hosts request format and some configurations
Update restful api deploy_hosts request format and some configurations

Update deploy_hosts request format in rest.py to be aligned with API service
also update gateway configurations in example deploy script.

Change-Id: I95123656ecbe56c96a8412d629c87c2c1a54897d

openstack/compass-core,openstack/compass-core,openstack/compass-core,baigk/compass-core,stackforge/compass-core,baigk/compass-core,openstack/compass-core,baigk/compass-core,stackforge/compass-core,stackforge/compass-core,stackforge/compass-core