MB-100: mention MB-8046 in CHANGES

Change-Id: Ie5ae7093970ee9318121412a34f050c815b79c08
Reviewed-on: http://review.couchbase.org/25594
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
MB-8056: log reason of kill_memcached failures

Change-Id: I7c94a878b8ef765d651db81c52c7f41d13684f36
Reviewed-on: http://review.couchbase.org/25595
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
MB-8056: always set babysitter's cookie

The reason of MB-8056 is that after node rename we didn't set
babysitter cookie again.

While reverting to always setting cookie on get_babysitter_node is
kinda unclean, it's better then alternative's I'm seeing. And it
works.

Change-Id: I487d40f515f2349361aaa29717c82f39f08a4cc3
Reviewed-on: http://review.couchbase.org/25596
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>