MXS-1457: Add test case

Added a test that reproduces the problem.

maxscale-system-test/mxs1457_ignore_deleted.cpp

@@ -0,0 +1,46 @@
+/**
+ * MXS-1457: Deleted servers are not ignored when users are loaded
+ *
+ * Check that a corrupt and deleted server is not used to load users
+ */
+
+#include "testconnections.h"
+
+int main(int argc, char *argv[])
+{
+    TestConnections test(argc, argv);
+
+    test.set_timeout(60);
+    test.repl->connect();
+    execute_query(test.repl->nodes[0], "CREATE USER 'auth_test'@'%%' IDENTIFIED BY 'test'");
+    execute_query(test.repl->nodes[0], "GRANT ALL ON *.* to 'auth_test'@'%%'");
+    test.repl->sync_slaves();
+    test.repl->close_connections();
+
+    // Stop slaves and drop the user on the master
+    test.repl->stop_slaves();
+    test.repl->connect();
+    execute_query(test.repl->nodes[0], "DROP USER 'auth_test'@'%%'");
+    test.repl->close_connections();
+
+    test.set_timeout(60);
+    MYSQL* conn = open_conn_db(test.rwsplit_port, test.maxscale_ip(), "test", "auth_test", "test", false);
+    test.add_result(mysql_errno(conn) == 0, "Connection with users from master should fail");
+    mysql_close(conn);
+
+    test.ssh_maxscale(true, "maxadmin remove server server1 \"RW Split Router\"");
+    conn = open_conn_db(test.rwsplit_port, test.maxscale_ip(), "test", "auth_test", "test", false);
+    test.add_result(mysql_errno(conn), "Connection should be OK: %s", mysql_error(conn));
+    test.try_query(conn, "SELECT 1");
+    mysql_close(conn);
+
+    test.set_timeout(60);
+    test.repl->connect();
+    execute_query(test.repl->nodes[1], "START SLAVE");
+    execute_query(test.repl->nodes[2], "START SLAVE");
+    execute_query(test.repl->nodes[3], "START SLAVE");
+    test.repl->sync_slaves();
+    test.repl->close_connections();
+
+    return test.global_result;
+}