Remove dead code and use travis_retry in npm install command in...

Remove dead code and use travis_retry in npm install command in tests/angularjs/scripts/install-ubuntu.sh to remove random travis failure.

tests/angularjs/scripts/install-ubuntu.sh

@@ -26,9 +26,7 @@ cd $DIR
 travis_retry sudo apt-get -qq install python-software-properties
 travis_retry sudo apt-add-repository -y ppa:chris-lea/node.js > /dev/null
 travis_retry sudo apt-get -qq update
-#travis_retry sudo apt-get -qq install nodejs
-#travis_retry sudo apt-get -qq install npm
 
 cd ..
 npm config set loglevel error
-npm install .
\ No newline at end of file
+travis_retry npm install .
\ No newline at end of file