First draft for openstack server create
Openstack server create command initial working implementation. Code refactor and test-cases in progress.
Removed msg_pair method as it is available in knife-cloud.
Merge remote-tracking branch 'origin/OC-8570-server-delete' into oc-8569-server-create

Conflicts:
	knife-openstack.gemspec
	lib/chef/knife/cloud/openstack_service.rb
common helpers used across commands.
use abstracted functionality.
fix command class as per review comment.
Merging with base
Merge pull request #3 from ClogenyTechnologies/oc-8569-server-create

First draft for openstack server create