change resource pool to use Fog gem

The Fog gem provides all the indirection for local storage (over nfs) or s3
access and replaces the old FilesystemPool.

Change-Id: Ia5ede90e8fd6cc9729eb87464d1cc0017f2d1c50
change AppPackage to use Fog Gem

The Fog gem provides all the indirection for local storage (over nfs) or s3
access.

Change-Id: I4877f04fa065c641b1b1d6021c3d1e6170ba2188
change droplet storage to use the Fog gem

Note: this really needs to be refactored.  There is non-trivial duplication
with the AppPackage code, and worse, the legacy staging api implementation is
managing storage now.  It really always was, but it was less in your face
before.

Change-Id: Id72b3f7b513cc05170f6e7e76273ae61501bc764
improved stager debugging

Change-Id: I6a77a6a4d0ede0b4a054070d4a6247e5368596f0
remove user_guid from provision request

The services code in cf-release hasn't been bumped to support this,
and it was causing all service provisioning to fail.;w

Change-Id: I60172bf3f47011120146e02b468bc50f9ce9c4e5