Get coverage for CLI/virt/power to 100%

[allmightyspiff]

$ tox -e coverage

File	Coverage	Missing Lines
SoftLayer/CLI/virt/power.py	43%	19-25, 37-50, 60-71, 80-82, 91-99, 108-110

To run just a specific test
$ pytest tests/CLI/modules/vs_tests.py

To run all tests
$ tox