- Ported MR !297 from master

Marius Burkard

2016-03-23 3c2aca7b9859733ecebcc93940c3f9a3c16cd3a2

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ALTER TABLE  `sys_session` CHANGE  `session_id`  `session_id` VARCHAR( 64 ) CHARACTER SET latin1 COLLATE latin1_swedish_ci NOT NULL;