Fixed a couple of missed options for NSLBMonitor

- Added missed lines in __init__.py for inclusion. Accidentally left
these out of the pull request earlier.
- Added missed options in nslbmonitor.py: maxforwards, iptunnel,
httprequest, rtsprequest
- Added a HUGELY updated/reformatted test script - adds tests for
adding/updating/deleting a LB monitor, among others.