Add time in the lock file

package_check.sh

@@ -175,7 +175,7 @@ then
 	fi
 fi
 # Create the lock file
-touch "$lock_file"
+echo "start:$(date +%s)" > "$lock_file"
 
 #=================================================
 # Check the internet connectivity

sub_scripts/testing_process.sh

@@ -1299,6 +1299,9 @@ TEST_LAUNCHER () {
 	starttime=$global_start_timer
 	# End the timer for the test
 	stop_timer 2
+
+	# Update the lock file with the date of the last finished test.
+	echo "$1 $2:$(date +%s)" > "$lock_file"
 }
 
 set_witness_files () {