Properly configure CloudSigma2 live test dependencies

Properly configured test dependencies in CloudSigma2 live tests and now all tests are passing. Yeeeha!

    Tests run: 50, Failures: 0, Errors: 0, Skipped: 0

Apart from configuring the dependencies I've changed the "list" live tests to depend on the "create" ones, to make sure they don't run with empty lists.

/cc @Kentzo @gcbirzan @shevchenator