HHH-5727 : Collection member declaration not handling optional AS in HQL.

According to the jpa persistence specification, the <code>AS</code> keyword is optional for collection declarations, such as the following: collection_member_declaration ::= IN (collection_valued_path_expression) [AS] identification_variable A HQL/JPQA such as the one below syntax caused a parser exception: SELECT o FROM EntityBean AS o, IN (o.items) AS l WHERE l.itemValue = '1' This occurred because Hibernate did not implement the <code>AS</code> keyword. Hibernate now follows the specification in this area, and allows the optional keyword.