failing if secret key file is found instead of locations.yaml, since it is written much earlier in the deployment process
Merge pull request #147 from shatterednirvana/fail-if-secret-found

Failing if secret key file is found instead of locations.yaml
added missing mocks
Merge github.com:shatterednirvana/appscale-tools into run-instances-in-py
Merge remote-tracking branch 'chris/fixed-tests' into run-instances-in-py