Fixed a couple of missed options for NSLBMonitor

- Added missed lines in __init__.py for inclusion. Accidentally left these out of pull request #59 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.