Changes for the dropped packets alerts

- remove "major" alert for the dropped packets;
- decrease threshold from 100 to 60 dropped packets per minute
for the "warning" alert.

Change-Id: I1995df00406fc0ecf8b84323150ca5be759c62a1
Related-PROD: PROD-25970 (PROD:25970)
(cherry picked from commit f89fb97623493460638ae89dec3e3d1ec9115819)
2 files changed