Disable allow failure tag

I feel we should change this policy, as people does not seem to pay attention otherwise - it was temporal from the beginning.

Of course we should also notify in the channel.

.gitlab-industrial-ci-kinetic-no-rosinstall.yml

@@ -130,7 +130,6 @@ file_syntax:
     - docker run -v ${PWD}:/ac cytopia/awesome-ci file-trailing-space --path=/ac --extension=py,txt,cpp,h,md,sh,bash,xml,launch --ignore=.ci_config || RET=1
     - docker run -v ${PWD}:/ac cytopia/awesome-ci file-utf8 --path=/ac --extension=py,txt,cpp,h,md,sh,bash,xml,launch --ignore=.ci_config || RET=1
     - exit $RET
-  allow_failure: yes
   when: always
   tags:
     - docker