service api improvements (termination, nodes creation, etc)
service api improvements (termination, nodes creation, etc)

xme1226/sahara,redhat-openstack/sahara,zhangjunli177/sahara,zhangjunli177/sahara,rnirmal/savanna,esikachev/sahara-backup,citrix-openstack-build/sahara,tellesnobrega/storm_plugin,xme1226/sahara,tellesnobrega/storm_plugin,zhangjunli177/sahara,ekasitk/sahara,tellesnobrega/sahara,openstack/sahara,zhujzhuo/Sahara,bigfootproject/sahara,henaras/sahara,keedio/sahara,esikachev/scenario,crobby/sahara,keedio/sahara,henaras/sahara,citrix-openstack-build/sahara,crobby/sahara,bigfootproject/sahara,egafford/sahara,zhujzhuo/Sahara,esikachev/scenario,ekasitk/sahara,crobby/sahara,citrix-openstack-build/sahara,mapr/sahara,tellesnobrega/storm_plugin,esikachev/sahara-backup,egafford/sahara,mapr/sahara,rnirmal/savanna,xme1226/sahara,openstack/sahara,matips/iosr-2015,ekasitk/sahara,keedio/sahara,mapr/sahara,matips/iosr-2015,bigfootproject/sahara,henaras/sahara,esikachev/sahara-backup,tellesnobrega/sahara,redhat-openstack/sahara,matips/iosr-2015,redhat-openstack/sahara,zhujzhuo/Sahara,esikachev/scenario