This patch implements all functionality required for dynamic, distributed
Nest interfaces that behave the same as single-process nest for local installs.

The existing MUSIC interfaces are deprecated and now subclass the adapters
and interfaces in the new hbp_distributed_nest package.

This patch does not support distributed, cluster launching, but this can
be adapted in the future from the existing MUSIC launchers.

Change-Id: I1aac3a59843d9fdfe051a9674566f3b3f5040ac1