first pass of integrating javelin2 to grenade

This provides support for creating users, images, servers, and
objects and checking on the far side.

Depends-On: If5f2674179eea4972ad43a1581073d483bb75d79 from
tempest to fix some javelin issues to make it usable.

Change-Id: I3634fd1c1db08a9a03e2dce56ebe5424fe2f27d5