Fix 'mysql_ldap_mapping' not being load to runtime at startup

lib/ProxySQL_Admin.cpp

@@ -10348,6 +10348,9 @@ void ProxySQL_Admin::__insert_or_replace_maintable_select_disktable() {
 #if defined(TEST_AURORA) || defined(TEST_GALERA)
 	admindb->execute("DELETE FROM mysql_servers WHERE gtid_port > 0"); // temporary disable add GTID checks
 #endif
+	if (GloMyLdapAuth) {
+		admindb->execute("INSERT OR REPLACE INTO main.mysql_ldap_mapping SELECT * FROM disk.mysql_ldap_mapping");
+	}
 }
 
 /* commented in 2.3 , unused