Make port and SSL optional

[xtagon]

Also sets use_ssl and port based on URI scheme if they're not already set.

Tests still pass, but I haven't added any new ones.

Resolves #42

The default proxy host/port options don't need to be explicitly set anymore, since they default to nil in the options hash now.

[coveralls]

Coverage remained the same when pulling 3038f91 on xtagon:feature/ssl-optional into 7b5930c on ManageIQ:master.

[Fryguy]

Looks good! Should https? be a private method? Aside from that, fix up the rubocop comments, and this looks good to merge. Thanks!

[xtagon]

@Fryguy https? could be made private if you want, but I figured it would be useful to be able to check whether my service objects are using HTTPS or HTTP. I fixed the rubocop stuff.

[Fryguy]

👍

[cfme-bot]

Checked commits xtagon@3038f91 .. xtagon@56d72df with rubocop 0.21.0
1 file checked, 0 offenses detected
Everything looks good. 👍