MXS-1156: Store master_heartbeat_period in master.ini

MXS-1156: Store master_heartbeat_period in master.ini

server/modules/routing/binlogrouter/blr.c

@@ -2817,6 +2817,11 @@ blr_handle_config_item(const char *name, const char *value, ROUTER_INSTANCE *ins
             }
         }
     }
+    /* Connect options */
+    else if (strcmp(name, "master_heartbeat_period") == 0)
+    {
+        inst->heartbeat = atol((char*)value);
+    }
     else
     {
         return 0;

server/modules/routing/binlogrouter/blr_file.c

@@ -3167,6 +3167,9 @@ blr_file_write_master_config(ROUTER_INSTANCE *router, char *error)
         fprintf(config_file, "master_tls_version=%s\n", ssl_version);
     }
 
+    /* Connect options */
+    fprintf(config_file, "master_heartbeat_period=%lu\n", router->heartbeat);
+
     fclose(config_file);
 
     /* rename tmp file to right filename */

server/modules/routing/binlogrouter/blr_slave.c

@@ -4711,6 +4711,8 @@ blr_master_apply_config(ROUTER_INSTANCE *router, MASTER_SERVER_CFG *prev_master)
         MXS_FREE(router->fileroot);
         router->fileroot = MXS_STRDUP_A(prev_master->filestem);
     }
+
+    router->heartbeat = prev_master->heartbeat;
 }
 
 /**