MXS-1451: Add test case

Added test case for MXS-1451 that reproduces the problem.

maxscale-system-test/mxs1451_skip_auth.cpp

@@ -0,0 +1,34 @@
+/**
+ * MXS-1451: Password is not stored with skip_authentication=true
+ *
+ * Check that connection through MaxScale work even if authentication is disabled
+ */
+
+#include "testconnections.h"
+
+int main(int argc, char *argv[])
+{
+    TestConnections test(argc, argv);
+
+    test.set_timeout(60);
+    test.tprintf("Creating user...");
+    test.repl->connect();
+    execute_query(test.repl->nodes[0], "CREATE USER 'auth_test'@'%s' IDENTIFIED BY 'test'", test.maxscale_ip());
+    execute_query(test.repl->nodes[0], "GRANT ALL ON *.* to 'auth_test'@'%s'", test.maxscale_ip());
+    test.repl->sync_slaves();
+    test.repl->close_connections();
+
+    test.set_timeout(60);
+    test.tprintf("Trying to connect through MaxScale");
+    MYSQL* conn = open_conn_db(test.rwsplit_port, test.maxscale_ip(), "test", "auth_test", "test", false);
+    test.try_query(conn, "SHOW DATABASES");
+    mysql_close(conn);
+
+    test.set_timeout(60);
+    test.tprintf("Dropping user");
+    test.repl->connect();
+    execute_query(test.repl->nodes[0], "DROP USER 'auth_test'@'%s'", test.maxscale_ip());
+    test.repl->close_connections();
+
+    return test.global_result;
+}