Galera MTR Tests: A test for xtrabackup with key+cert encryption.

mysql-test/suite/galera/r/galera_sst_xtrabackup-v2_encrypt_with_key.result

+SELECT 1;
+1
+1

mysql-test/suite/galera/t/galera_sst_xtrabackup-v2_encrypt_with_key.cnf

+!include ../galera_2nodes.cnf
+
+[mysqld]
+wsrep_sst_method=xtrabackup-v2
+wsrep_sst_auth="root:"
+wsrep_debug=ON
+
+[SST]
+tkey=@ENV.MYSQL_TEST_DIR/std_data/galera-key.pem
+tcert=@ENV.MYSQL_TEST_DIR/std_data/galera-cert.pem
+encrypt=3

mysql-test/suite/galera/t/galera_sst_xtrabackup-v2_encrypt_with_key.test

+#
+# This test checks that key and cert encryption options can be passed to xtrabackup via the my.cnf file
+# Initial SST happens via xtrabackup, so there is not much to do in the body of the test
+#
+
+--source include/big_test.inc
+--source include/galera_cluster.inc
+--source include/have_innodb.inc
+
+SELECT 1;
+
+--let $wait_condition = SELECT VARIABLE_VALUE = 2 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size';
+--source include/wait_condition.inc