Added test case for issue #1143
[ext] access static properties, fixed #1143

Twig extension access static properties wheras it should not
merged branch tucksaun/fix-issue-1143 (PR #1147)

This PR was merged into the master branch.

Discussion
----------

Fix issue #1143

Commits
-------

5042159 [ext] access static properties, fixed #1143
dfc335f Added test case for issue #1143
updated CHANGELOG