Add Openstack SSL Support

Allow Openstack connections to be protected with SSL.

Additionally, remove some unused methods in `EmsOpenstack`.

WIP: Looking at how to add tests for this.

Rebased: included tests and fixed a problem with the raw_connect method.

Rebased for rubocop
On a serious note:  looks like the environment_builder still uses `EmsOpenstack.raw_connect`.  I'll have to add it back in, anyway.

I'm more than happy to look at revamping how we build openstack connections.  But, I'd rather have that as part of a separate PR.  Don't wanna muddy the waters here.