Bug-8187: call home throwing exception on startup

Remove distracting exception in log.
Restore ability to change the call home server port.
Move to using blueprint for configuration instead of
using ad hoc logic.

Change-Id: I273156ba13237b1ed8efc0e6ff9861b1aa5feb3b
Signed-off-by: allan clarke <clarkea@brocade.com>