#1069 - Virtual Placement Group support

[allmightyspiff]

Adds the following CLI commands, and a manager for vs_placementgroups

slcli vs placementgroup --help
Usage: slcli vs placementgroup [OPTIONS] COMMAND [ARGS]...

  Base command for all capacity related concerns

Options:
  -h, --help  Show this message and exit.

Commands:
  create          Create a placement group
  create-options  List options for creating Reserved Capacity
  delete          Delete a placement group.
  detail          View details of a placement group.
  list            List Reserved Capacity groups.

[coveralls]

Coverage increased (+0.2%) to 90.266% when pulling ed7b636 on allmightyspiff:issues1069 into d047447 on softlayer:master.

[acamacho82]

I couldn't find issues and the code looks good! :)

[FernandoOjeda]

The same for me, the code looks good.