New Feature: Loadbalancers

[allmightyspiff]

Upgrades the loadbalancer manager to work with LBaaS and Netscaler products.

Adds the following commands.

Commands:
  cancel         Cancels a LBaaS instance
  detail         Get Load Balancer as a Service details.
  health         Manage LBaaS health checks.
  l7pool-add     Adds a new l7 pool -S is in colon deliminated format to make grouping IP:port:weight a bit easier.
  l7pool-del     Deletes the identified pool Identifier is L7Pool Id.
  list           List active Load Balancer as a Service devices.
  member-add     Add a new LBaaS members.
  member-del     Remove a LBaaS member.
  ns-detail      Get Netscaler details.
  ns-list        List active Netscaler devices.
  order          Creates a LB.
  order-options  Prints options for order a LBaaS
  pool-add       Adds a listener to the identifier LB
  pool-del       Removes the listener from identified LBaaS instance LISTENER should be a UUID, and can be found from `slcli lb detail <IDENTIFIER>`
  pool-edit      Updates a listener's configuration.

[allmightyspiff]

Fixes #1047