Disabling EnterpriseKioskApp tests due to failures.

BUG=306611
R=abodenha@chromium.org
TBR=abodenha@chromium.org, mnissler@chromium.org

Review URL: https://codereview.chromium.org/26994005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@228204 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 228204