ovirt-hosted-engine-ha: initial commit

oVirt Hosted Engine HA initial commit

This project is divided into 2 main pieces:

 - an HA agent, which considers the state of systems eligible to take
   part in HA and decides whether to run the engine or not

 - an HA broker, which manages communication to storage as well as
   various submonitors which are used to monitor the current host

A few pending work items are remaining, marked FIXME in the code.
Less important/longer-term fixup is marked TODO.

Change-Id: I3853db529ed353e7d5080692029ab80262a02c91
Signed-off-by: Greg Padgett <gpadgett@redhat.com>