add test fixtures
add try/except protection to common errors
use testsetup to fetch user/pass

added mgmt_sys initiation and usage
some pylint cleanup
used mgmt_system type instead of name to determine what kind of client to create
moved fixture to conftest.py
updated requirement to include pysphere and ovirt-sdk
Merge pull request #37 from segfault923/soap_api

add test fixtures, mgmt_sys usage