install composer packages for hhvm also

Signed-off-by: Chirayu Chiripal <chirayu.chiripal@gmail.com>

.travis.yml

@@ -23,6 +23,9 @@ before_script:
   - export PATH=~/.composer/vendor/bin/:$PATH
   - mysql -uroot -e "SET PASSWORD = PASSWORD('$TESTSUITE_PASSWORD')" ;
   - set -e ; if [[ -z "$LINT" ]] ; then
+
+    composer install --dev --no-interaction ;
+
     if [[ $TRAVIS_PHP_VERSION != "hhvm" ]] ; then
 
     if [[ $TRAVIS_PHP_VERSION != "5.6" ]] ; then
@@ -37,8 +40,6 @@ before_script:
     phpenv config-add test/travis.php.ini ;
     fi
 
-    composer install --dev --no-interaction ;
-
     wget https://scrutinizer-ci.com/ocular.phar ;
 
     fi ;