Restart stunnel earlier in configure.d

stunnel should be started as part of configure.d.
Delaying the restart in the post-configure.d causes
MySQL connection errors for keystone db_sync.  This is
required for MySQL connection over SSL to work successfully.

Change-Id: I2eb4af2f2dd8b302979384dbe17b63b3397d33bf
Merge "Restart stunnel earlier in configure.d"