[monitor-assign] Set timeout for crashed monitors to 450 s

It was set to 15 s in the assign-view demo, which made the monitors
keep unassigning each other after the previous commit.
Signed-off-by: Roger Pueyo Centelles <rpueyo@ac.upc.edu>

monitor-assign/monitor-assign.go

@@ -53,7 +53,7 @@ var DEFAULTFILEMODE os.FileMode = 0755
 //Default settings and descriptions
 
 // monitorTimeout defines how long to wait before removing a crashed monitor from the database
-var monitorTimeout int64 = 15
+var monitorTimeout int64 = 450
 
 // idNum holds the monitor id, in numberic form
 var idNum int