Task SW-564: Allow 20s for pid file to appear instead of 1s

SubSystems/Online_Cobalt/test/tstartBGL.run

@@ -67,8 +67,13 @@ for cluster in CEP4 DRAGNET; do  # all in cobalt_functions.sh as used by runObse
 
   # PID file is created by runObservation.sh, which is started in the background. Although the PID file
   # is created almost immediately, we may be too fast if we check without waiting.
-  # Used 'nice -n 5' to dramatically increase the chance that we check before the pid file is removed again.
+  # PID file must appear within 20s
+  TIMEOUT=20
+  while [ "$TIMEOUT" -gt 0 -a ! -e $LOFARROOT/var/run/rtcp-1000.pid ]
+  do
     sleep 1
+    TIMEOUT=$((TIMEOUT - 1))
+  done
   [ -e $LOFARROOT/var/run/rtcp-1000.pid ] || error "Found no $LOFARROOT/var/run/rtcp-1000.pid"
 
   # PID file must be gone after 20s