Revision 1857818

Fixed: Ensure that ‘MapContext’ preserves insertion order properties
(OFBIZ-10933)

This fixes a regression introduced in revision 1837462.

When pushing a ‘LinkedHashMap’ inside a ‘MapContext’, the iteration
order of the ‘MapContext’ values was not corresponding to the
insertion order of the embedded ‘LinkedHashMap’ which is important in
the ‘ControllerConfig’ case where configuration elements are stored in
‘LinkedHashMap’ objects and the ‘include’ mechanism relies on
‘MapContext’.

To avoid such regression in the future, a test reproducing the bug has
been added.

Thanks: Gil Portenseigne for investigating.