README for implementing HA mondo tests

Wiki for Mondo tests :https://wiki.eng.vmware.com/MondoBizarro

Goal:
- The idea is to run a set of operations with different probabilites of their execution to stress VC for a certain period.
- The goal is not to verify the status of the operations but to make sure that VC does not crash under the load.

Details:
- Look at /vpx/support/python/MondoBizarro/haMondo.py for a reference test.
- Look at /vpx/support/python/MondoBizarro/ha.mondo.cfg for the operation occurence probability settings.
- As of now, the haMondo test runs a few basic operations on an HA configured cluster. It also runs the reboot operation for the host which triggers failovers/HA related workflow/code in vpxd.

Future Work:
- More operations like causing APD/PDL can be added to the library to trigger VMCP related HA related code residing in vpxd.
- Maybe the Mondo framework can also monitor fdm and hostd processes on the host to make sure that they do not crash under similar load. As of now it monitors only vpxd crashes.

ha.mondo.cfg:
- This file contains the list of functions to be executed with the probability of their execution.
- For eg if you for don't want to test vApp functionality, you can set 'mondoCreateVApp=0' in ha.mondo.cfg file.
