Bug#30672362: GROUP REPLICATION TEST FAILING ON WIN DUE TO STATIC INITIALIZATIONS OF VARIABLES

Issue
=====
The testcases gr_autostart_on_install, gr_user and gr_readmode_on_autostart
are failing Windows platform when build with with openssl-1.1.1d-static
Group Replication started with 'group_replication_ssl_mode=REQUIRED' mode.

The issue is because of variables plugin_is_being_uninstalled and
plugin_is_waiting_to_set_server_read_mode are not getting reset in
plugin_group_replication_init() (called when
`INSTALL PLUGIN group_replication..` is executed) and their static
initialization in plugin.cc.

Solution
========
Remove static initialization of plugin variables plugin_is_being_uninstalled
and plugin_is_waiting_to_set_server_read_mode in plugin.cc and reset them in
plugin_group_replication_init().

RB: 23559

Author: Hemant Dangi

rapid/plugin/group_replication/src/plugin.cc

@@ -38,12 +38,12 @@ unsigned int plugin_version= 0;
 
 //The plugin running flag and lock
 static mysql_mutex_t plugin_running_mutex;
-static bool group_replication_running;
+bool group_replication_running= false;
 bool wait_on_engine_initialization= false;
 bool server_shutdown_status= false;
 bool plugin_is_auto_starting= false;
-static bool plugin_is_waiting_to_set_server_read_mode= false;
-static bool plugin_is_being_uninstalled= false;
+bool plugin_is_waiting_to_set_server_read_mode= false;
+bool plugin_is_being_uninstalled= false;
 
 /* Plugin modules */
 //The plugin applier
@@ -987,6 +987,11 @@ int terminate_plugin_modules(bool flag_stop_async_channel)
 
 int plugin_group_replication_init(MYSQL_PLUGIN plugin_info)
 {
+  // Reset plugin local variables.
+  group_replication_running= false;
+  plugin_is_being_uninstalled= false;
+  plugin_is_waiting_to_set_server_read_mode= false;
+
   // Register all PSI keys at the time plugin init
 #ifdef HAVE_PSI_INTERFACE
   register_all_group_replication_psi_keys();

rapid/unittest/gunit/group_replication/CMakeLists.txt

@@ -1,4 +1,4 @@
-# Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2014, 2019, Oracle and/or its affiliates. All rights reserved.
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License, version 2.0,