vnctl does not support adding/removing static_address rules

[Metallion]

Split from #424.

The web api has routes for adding and removing static address translations https://github.com/axsh/openvnet/blob/develop/vnet/lib/vnet/endpoints/1.0/translations.rb#L49-L97.

These have not been implemented in vnctl yet. They should be. https://github.com/axsh/openvnet/blob/develop/client/vnctl/lib/vnctl/cli/translation.rb#L18

[Metallion]

https://github.com/axsh/openvnet/blob/feature-filter2manager/client/vnctl/lib/vnctl/cli/filter.rb#L17-L36

The filter2manager feature has implemented something similar which will be re-usable for this. I'll get that merged asap so we can reuse it here.

[Metallion]

Done. #433