Merge pull request #2251 from matrix-org/bwindels/noe2eforredesign

disable e2e tests for PRs targeted at experimental (redesign)

.travis-test-riot.sh

@@ -27,6 +27,8 @@ npm run build
 npm run test
 popd
 
+if [ "$TRAVIS_BRANCH" != "experimental" ]
+then
     # run end to end tests
     git clone https://github.com/matrix-org/matrix-react-end-to-end-tests.git --branch master
     pushd matrix-react-end-to-end-tests
@@ -36,3 +38,4 @@ ln -s $REACT_SDK_DIR/$RIOT_WEB_DIR riot/riot-web
     ./install.sh
     ./run.sh --travis
     popd
+fi