notifier: send sysUpTime in snmp notifications.

Sysuptime is measured since the notification service was started.
Time ticks represent a100th of a second.

Change-Id: I1f908ec8d7b9ce27bd845a568cc4ed195aafc9ab
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1131175
Signed-off-by: Mooli Tayer <mtayer@redhat.com>
(cherry picked from commit cbafd6fc63ab7861b164948775d9e5730963c469)