Pass cbauth env variables to 2i components

Change-Id: I2f4341f18205b2b29d959e1fb53eed45bd5b3af4
Reviewed-on: http://review.couchbase.org/44679
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
recognize auth to this node by 127.0.0.1 hostname

Change-Id: Id64c78a26dfa2603e0460b78cace319dccfc0c47
Reviewed-on: http://review.couchbase.org/44553
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>