Fix Docstrings for test_server_basic_ops.py

In commit I80d785bb5b325ccfac3c5cfd9d076718cf587e80,
Pause/unpause & Suspend/resume tests have been moved from this
test class but docstring was not updated.

Closes-Bug: #1353814

Change-Id: If890e459a9621e74df55d60d8befe53c471aa83f
Merge "Fix Docstrings for test_server_basic_ops.py"
Merge branch 'master' of https://github.com/openstack/tempest