Fix racey clouds.yaml test
Fix racey clouds.yaml test

We are running tests that operate on clouds.yaml in the cwd. This is
racey, so instead use a tmpdir and point os-c-c at the correct
clouds.yaml.

Change-Id: Ic74ed3b4e9d7c524d5cc02d3ac371510f0d61f16

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