Revert "build and install saslauthd-port from cbauth package"

This reverts commit 67d97c8ddf2d34fdafd1fae09234d9f1f55139e1.

Change-Id: I674f4ebbea7885d6f519bfa21d2a7fa3ac10ff70
Reviewed-on: http://review.couchbase.org/44216
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>