Bug #22909 Using CREATE ... LIKE is possible to create
           field with invalid default value
Bug #35935 CREATE TABLE under LOCK TABLES ignores FLUSH
           TABLES WITH READ LOCK
Bug #37371 CREATE TABLE LIKE merge loses UNION parameter

These bugs were originally fixed in the 6.1-fk tree and the fixes
were backported as part of the fix for Bug #42546 "Backup: RESTORE
fails, thinking it finds an existing table". This patch backports
test coverage missing in the original backport. The patch contains
no code changes.