fix the test to work

without preceding sys_vars.wsrep_provider_basic

mysql-test/suite/sys_vars/r/wsrep_provider_options_basic.result

@@ -2,6 +2,7 @@
 # wsrep_provider_options
 #
 call mtr.add_suppression("WSREP: Failed to get provider options");
+SET @@global.wsrep_provider =  @@global.wsrep_provider;
 # save the initial value
 SET @wsrep_provider_options_global_saved = @@global.wsrep_provider_options;
 # default

mysql-test/suite/sys_vars/t/wsrep_provider_options_basic.test

@@ -6,6 +6,8 @@
 
 call mtr.add_suppression("WSREP: Failed to get provider options");
 
+SET @@global.wsrep_provider =  @@global.wsrep_provider;
+
 --echo # save the initial value
 SET @wsrep_provider_options_global_saved = @@global.wsrep_provider_options;