Post-merge fixes: Disable rpl_mts_dependency_unique_key_conflicts test

It uses --slave-use-idempotent-for-recovery which is not available in MariaDB.

storage/rocksdb/mysql-test/rocksdb_rpl/t/disabled.def

@@ -9,6 +9,7 @@ rpl_skip_trx_api_binlog_format : requires @@rpl_skip_tx_api
 rpl_ddl_high_priority : DDL commands with HIGH_PRIORITY syntax are not in MariaDB
 rpl_gtid_rocksdb_sys_header : MariaDB doesn't support printing "RocksDB: Last MySQL Gtid UUID" into server stderr on startup
 singledelete_idempotent_recovery: MariaDB doesn't support --slave-use-idempotent-for-recovery
+rpl_mts_dependency_unique_key_conflicts: MariaDB doesn't support --slave-use-idempotent-for-recovery
 rpl_missing_columns_sk_update : Uses log_column_names=ON feature which is only present in FB/MySQL
 
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