PXE tests; Changed location of configuration.yaml and mozwebqa.cfq in soap_base.py

PXE tests moved from cfme_pages to cfme_tests. Also, I changed location of configuration files in soap_base.py, I think it should not search for them in /cfme_pages, but in the upper directory. Please, review.

There is test 'test_management_systems' test, which I think is already covered elsewhere. It would be best if I had confirmation on that, I can then delete it from PXE tests.

In cfme_pages should stay simplified versions of these tests.