Add addCleanup just after resource creation

This patch follows the sequence of adding addCleanup
just after creating a resource similar to whole
keystone-tempest-plugin repo. This is to avoid the
resource leakage issue if anything happen between
resource creation and addcleanup line.

Change-Id: I258c440417eaecb8f5ed4dc1e0eb6138edda883b
1 file changed