Pass 2i indexer ports as cmdline args

All the required indexer ports are now supplied by the babysitter.
Also added indexer ports into node services discovery list.

[alk@tut.by: removed unused variable & rebased]
Signed-off-by: Aliaksey Kandratsenka <alk@tut.by>
Change-Id: If7001b7f322ad9aa2fc1149b8f38a79d7606beac
Reviewed-on: http://review.couchbase.org/44089
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>