create_bare_cluster test modifications

Meant to bring you up to date with https://github.com/gtzelepis/e-science/commit/eb21a349dee515d31d9243e1d80524df3dc8f21b

Changelog:
 - refactor create_bare_cluster test name to conform to team convention …

- modify imports and path resolution so test can be run with nosetests
python interpreter or unittest runner.