Remove short open tags in site-content

Change-Id: I6313c0f238d9d5a31c726a0decd95a7ca942f2b7
Merge commit 'refs/changes/26/2426/5' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  Remove short open tags in site-content
This is Tuleap 7.0.99.43

Change-Id: I4d68de8ab11f9634322d8ccde5daeffe81bfeeee