The fix includes deprecation of the following Dialect methods in 5.0 branch:

{{supportsIdentityColumns()
supportsInsertSelectIdentity()
hasDataTypeInIdentityColumn()
appendIdentitySelectToInsert(String insertString)
getIdentitySelectString(String table, String column, int type)
getIdentityColumnString(int type)
getIdentityInsertString()
}}

These methods are removed in master.