Restart ssl application after certificate gets updated.

ssl application keeps a cache of certificate files. I didn't find an
easy way to flush the cache, so instead I restart the application as
part of restarting ssl-related services.

Change-Id: I687bdb7c80be6e737c9354277edb8bcfd99e2d1b
Reviewed-on: http://review.couchbase.org/33544
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>