Bug 1029: Remove dead code: p2site

opendaylight/distribution/p2site/ is dead code that is not being
built and hasn't for some time.  Its complicating keeping
versions up to date and verifying that they are up to date.

Change-Id: I7625bfa2fca273cd4a0c7e78734a4763a6f86544
Signed-off-by: Ed Warnicke <eaw@cisco.com>