[Bug] Device SysInfo doesn't update if the device is restarted

[sbengo]

We have seen that after a device restart, the related and gathered device SysInfo remains with the old information

Example with SysUptime of a device that has been restarted 2 hours ago:

Device SysUptime, viewed from runtime:

SysUptime: 1287583000000000

Query to the SysUptime OID:

OID	Type	Value
.1.3.6.1.2.1.1.3.0	TimeTicks	705456