Track the number of performed monitoring intervals

Tracking how many times the monitor has performed its monitoring allows
the test framework to consistently wait for an event instead of waiting
for a hard-coded time period. The MaxCtrl `api get` command can be used to
easily extract the numeric value.

server/modules/monitor/auroramon/auroramon.c

@@ -123,6 +123,7 @@ monitorMain(void *arg)
 
     while (!handle->shutdown)
     {
+        atomic_add_uint64(&monitor->ticks, 1);
         lock_monitor_servers(monitor);
         servers_status_pending_to_current(monitor);
 

server/modules/monitor/galeramon/galeramon.c

@@ -545,6 +545,7 @@ monitorMain(void *arg)
         /* reset cluster members counter */
         is_cluster = 0;
 
+        atomic_add_uint64(&mon->ticks, 1);
         lock_monitor_servers(mon);
         servers_status_pending_to_current(mon);
 

server/modules/monitor/grmon/grmon.cc

@@ -270,6 +270,7 @@ void GRMon::main()
 
     while (!m_shutdown)
     {
+        atomic_add_uint64(&m_monitor->ticks, 1);
         lock_monitor_servers(m_monitor);
         servers_status_pending_to_current(m_monitor);
 

server/modules/monitor/mariadbmon/mariadbmon.cc

@@ -2204,6 +2204,7 @@ monitorMain(void *arg)
         /* reset num_servers */
         num_servers = 0;
 
+        atomic_add_uint64(&mon->ticks, 1);
         lock_monitor_servers(mon);
         servers_status_pending_to_current(mon);
 

server/modules/monitor/mmmon/mmmon.c

@@ -543,6 +543,7 @@ monitorMain(void *arg)
         }
         nrounds += 1;
 
+        atomic_add_uint64(&mon->ticks, 1);
         lock_monitor_servers(mon);
         servers_status_pending_to_current(mon);
 

server/modules/monitor/ndbclustermon/ndbclustermon.c

@@ -347,6 +347,7 @@ monitorMain(void *arg)
         }
         nrounds += 1;
 
+        atomic_add_uint64(&mon->ticks, 1);
         lock_monitor_servers(mon);
         servers_status_pending_to_current(mon);