update zombie count

linux/files/sensu.conf

@@ -1,5 +1,5 @@
 local_linux_system_zombie_procs:
-  command: "PATH=$PATH:/usr/lib64/nagios/plugins:/usr/lib/nagios/plugins check_procs -w 1 -c 5 -s Z"
+  command: "PATH=$PATH:/usr/lib64/nagios/plugins:/usr/lib/nagios/plugins check_procs -w 2 -c 7 -s Z"
   interval: 60
   occurrences: 3
   subscribers: