orchestration api refactor access to stack outputs

Refactor test_server_cfn_init access to stack outputs so it uses
a new wrapper which gets the stack and returns the requested
output.  This provides a useful function which can be used in
other tests which parse the stack output.  Since we no longer
need to get the stack in test_server_cfn_init, remove the gets
and duplicate checks for CREATE_COMPLETE.

Change-Id: If1d0990ac9467b6e9778e4444b2ec5fc0f1e44e7
2 files changed