MB-7226: implement /controller/reAddNode via setRecoveryType

Because the later is superset of the former. And because the later
does proper validation.

Change-Id: Ia11227c3e1173e3d4b90b1a0c557176eff447a45
Reviewed-on: http://review.couchbase.org/42210
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>