Remove ofvtool dependancy

[yasensim]

I find the need of downloading and installing ovftools disturbing and plan to remove it by completely rewriting nsx_deploy_ova.py.
The plan is to use pyvmomi only for this activity.
@yfauser and @avoltmer , please let me know if you find it valuable and I will find some time next week to work on it.

[yfauser]

@yasensim Absolutely valuable! I always wanted to have a ova module that is independent of ovftool, I just never found the time to work on it myself. You can have a look at the open stack Nova code and talk to the the team working on it. It's python and already does the job to upload OVAs. Also, it's not using pyvmomi, so it might reduce the number of module dependencies even more.

[DanyC97]

i believe the below will do https://github.com/vmware/pyvmomi-community-samples/blob/master/samples/deploy_ova.py and since will rely on pyvmomi it will be easy to be upstream as ansible module?

[yasensim]

I also have something written but seems I am too slow to mege. I will review and grab if there is something better. Thanks for the link!

[dredex]

Was this ever finished? It's still listed in the documentation that ovftool is a dependency.