[sample] vcrpy as flight recorder

Here's an example of a simple work-around that will allow
you to log a pyvmomi HTTP conversation using VCR.

Closes https://github.com/vmware/pyvmomi-community-samples/issues/121
relocated waitforupdates sample
fix waitforupdates sample issues for merging
relocate serviceutil port to tools, update imports
add option to disable ssl verification warnings since switch to requests
add sample usage
formatting changes for pep8