XA recovery not supported for RocksDB

# Run with --mysqld=--plugin-load-add=ha_rocksdb

--connect (con1,localhost,root,,test)

DROP TABLE IF EXISTS t1;

CREATE TABLE t1 (a INT) ENGINE=RocksDB;

XA START 'xa1';

INSERT INTO t1 (a) VALUES (1),(2);

XA END 'xa1';

XA PREPARE 'xa1';

--connect (con2,localhost,root,,test)

XA START 'xa2';

INSERT INTO t1 (a) VALUES (3);

INSERT INTO t1 (a) VALUES (4);

XA END 'xa2';

XA PREPARE 'xa2';

--connection default

sleep 1;

--let $shutdown_timeout= 0

--source include/restart_mysqld.inc

--connect (con3,localhost,root,,test)

--disable_abort_on_error

XA RECOVER;

XA ROLLBACK 'xa1';

XA COMMIT 'xa2';

SELECT a FROM t1;

DROP TABLE t1;

connect  con3,localhost,root,,test;

XA RECOVER;

formatID	gtrid_length	bqual_length	data

XA ROLLBACK 'xa1';

ERROR XAE04: XAER_NOTA: Unknown XID

XA COMMIT 'xa2';

ERROR XAE04: XAER_NOTA: Unknown XID

SELECT a FROM t1;

a

DROP TABLE t1;