Fix more str!=int bugs
Fix more str!=int bugs

When we return ids after creating servers or images, coerce them
to strings so they compare correctly when we wait for them.

Change-Id: I6d4575f9a392b6028bcec4ad57299b7f467cb764

citrix-openstack/nodepool,seandst/nodepool,Tesora/tesora-nodepool,citrix-openstack/nodepool,seandst/nodepool,Tesora/tesora-nodepool