Auth split

* add ability to specify provisioning profile (-p)
  Two provisioning proviles are available:
  * simple: 1 proxy, 3 storage, 1 management (default)
  * split: 1 proxy, 1 auth proxy, 3 storage, 1 management
* Set forks to 10 to allow simultaneous prov on split profile
* Currently auth-proxy is identical to proxy

Split profile is for provisioning with split auth -- oauth on account
management, swauth on cluster endpoint.