Monitor json diagnostics printing cleanup

The 'events' and 'script' config values were defined for every monitor.
Removed the extra definitions and moved the variables to MXS_MONITOR.

MariaDBMonitor was printing config values a second time, they are
already printed by the caller.

Moved the events enum definition to the internal header since it's no longer
required by modules.

Added a default config setting "all" to 'events' to clarify that it enables
all events.

server/core/internal/monitor.h

@@ -47,6 +47,37 @@ typedef enum
     MONITOR_CONNECT_ATTEMPTS = 3
 } monitor_timeouts_t;
 
+/* Is not really an event as the other values, but is a valid config setting and also the default.
+ * Bitmask value matches all events. */
+static const MXS_ENUM_VALUE mxs_monitor_event_default_enum = {"all", ~0ULL};
+static const MXS_ENUM_VALUE mxs_monitor_event_enum_values[] =
+{
+    mxs_monitor_event_default_enum,
+    {"master_down", MASTER_DOWN_EVENT},
+    {"master_up", MASTER_UP_EVENT},
+    {"slave_down", SLAVE_DOWN_EVENT},
+    {"slave_up", SLAVE_UP_EVENT},
+    {"server_down", SERVER_DOWN_EVENT},
+    {"server_up", SERVER_UP_EVENT},
+    {"synced_down", SYNCED_DOWN_EVENT},
+    {"synced_up", SYNCED_UP_EVENT},
+    {"donor_down", DONOR_DOWN_EVENT},
+    {"donor_up", DONOR_UP_EVENT},
+    {"ndb_down", NDB_DOWN_EVENT},
+    {"ndb_up", NDB_UP_EVENT},
+    {"lost_master", LOST_MASTER_EVENT},
+    {"lost_slave", LOST_SLAVE_EVENT},
+    {"lost_synced", LOST_SYNCED_EVENT},
+    {"lost_donor", LOST_DONOR_EVENT},
+    {"lost_ndb", LOST_NDB_EVENT},
+    {"new_master", NEW_MASTER_EVENT},
+    {"new_slave", NEW_SLAVE_EVENT},
+    {"new_synced", NEW_SYNCED_EVENT},
+    {"new_donor", NEW_DONOR_EVENT},
+    {"new_ndb", NEW_NDB_EVENT},
+    {NULL}
+};
+
 MXS_MONITOR *monitor_create(const char *, const char *, MXS_CONFIG_PARAMETER* params);
 void monitor_destroy(MXS_MONITOR *);