Bug 2204: pcc-mock now allows zero LSPs per PCC.

Also, 127.0.0.1 is new default remote address,
and condition on number of command line arguments is removed.

Change-Id: I78491a52d60df954b35a2689a5746bcb59eb2ebd
Signed-off-by: Vratko Polak <vrpolak@cisco.com>
(cherry picked from commit b9cf0a787e53767d7093e03250c652df3228ade2)