Clean up xapi.storage.log log-entries
Clean up xapi.storage.log log-entries

This commit contains two changes:
   - Don't log the timestamp explicitly, as syslog already adds this implicitly.
   - Flag log-entries as belonging to SMAPIv3 - this is similar to SMAPIv1
     flagging as SM.

Signed-off-by: Robert Breker <bfcd7039ca4b92386f0756a1d5e67ea4ff23cfe0@citrix.com>

xapi-project/message-switch,xapi-project/message-switch,xapi-project/message-switch