Service catalogs automated fro Vsphere and RHEV
VMWareProvider __init__ no longer connects

We were connecting to the vsphere API every time we instantiated the mgmtsys class,
causing delays in test collection. This speed things back up.
checkskip function for test generators

helps deal with parametrization that yields no params, warns in that case
Merge pull request #539 from seandst/lazy-vsphere

VMWareProvider __init__ no longer connects
Make sure infrastructure providers are setup
Extend wait times again
Removed test which will be reintroduced later
Merge pull request #540 from psav/fix_candu

Make sure infrastructure providers are setup
Merge pull request #541 from psav/extend_wait

Extend wait times again
Merge pull request #543 from psav/remove_assign_policy

Removed test which will be reintroduced later
Merge pull request #429 from sshveta/servicecatalogs

Servicecatalogs
Merge pull request #538 from seandst/testgen-checkskip

checkskip function for test generators
Added the delete method to providers

Added delete() method to Provider classes
Added test_provider_delete to tests
Merge pull request #545 from psav/cru_to_crud

Added the delete method to providers