Added missing test coverage for run_command_and_log function
Added missing test coverage for run_command_and_log function

Change-Id: I5136a7efb187e23542516ea647cf04309977d777
Co-Authored-By: Kamil Sambor <e850f8f08c2fda7945ccec7d3a5ad4a02ce3588f@redhat.com>

openstack/python-tripleoclient