MB-100: include otpNode even if auth is not admin

Because RO user UI will need this stuff.

Change-Id: I6dfd4b5007c3280d4d8b533b1614f3ca79e1243f
Reviewed-on: http://review.couchbase.org/27946
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>