Adding two more options to verification_tests options

Adding no_compute_sanity and no_compute_smoke options to
rally/benchmark/tests.py:verification. Each option is analogue of
standart option but skipping tests that will fail if compute section
in Cloud_config is not specified

Fixing testing not working properly on current pytest version.

Change-Id: I76cdfd6a0dc8debcd2a6f1db3506a6f137e78869
Closes-bug: #1236552
Merge "Adding two more options to verification_tests options"