[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
Merge pull request #122 from hartsock/issues/121

[sample] vcrpy as flight recorder
relocated waitforupdates sample
relocate serviceutil port to tools, update imports
fix waitforupdates sample issues for merging
add option to disable ssl verification warnings since switch to requests
add sample usage