MDEV-6247: Merge 10.0-galera to 10.1.

Merged lp:maria/maria-10.0-galera up to revision 3879.

Added a new functions to handler API to forcefully abort_transaction,
producing fake_trx_id, get_checkpoint and set_checkpoint for XA. These
were added for future possiblity to add more storage engines that
could use galera replication.

mysql-test/include/galera_connect.inc

@@ -0,0 +1,45 @@
+# galera_connect.inc
+# ==================
+#
+# Description
+# -----------
+# Open a connection to the specified server number ($galera_server_number).
+# The connection itself would be identified by $galera_connection_name.
+#
+# Parameters
+# ----------
+# $galera_connection_name
+#   Name of the resulting connection.
+#
+# $galera_server_number
+#   Sequence number of the node in the galera cluster.
+#
+# $galera_debug
+#   Print debug information.
+#
+
+if (!$galera_connection_name)
+{
+  --die ERROR IN TEST: $galera_connection_name must be set before sourcing include/galera_connect.inc
+}
+
+if (!$galera_server_number)
+{
+  --die ERROR IN TEST: $galera_server_number must be set before sourcing include/galera_connect.inc
+}
+
+--let $_galera_port= \$NODE_MYPORT_$galera_server_number
+if (!$_galera_port)
+{
+  --echo Bug in test case: '\$NODE_MYPORT_$galera_server_number' not initialized. Check the test's .cfg file.
+  --die Not all NODE_MYPORT_* environment variables are setup correctly.
+}
+
+if ($galera_debug)
+{
+  --echo connect($galera_connection_name,127.0.0.1,root,,test,$_galera_port,)
+}
+
+# Open a connection
+--connect($galera_connection_name,127.0.0.1,root,,test,$_galera_port,)
+