minor #1341 disable Xdebug on Travis CI when possible (xabbuh)

This PR was merged into the 1.8 branch.

Discussion
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disable Xdebug on Travis CI when possible

This seems to accidentally have been missed in some of our last merges
of the `1.7` branch into `1.8`.

Commits
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e889355 disable Xdebug on Travis CI when possible

Author: xabbuh

.travis.yml

@@ -33,6 +33,7 @@ matrix:
       env: SYMFONY_VERSION=2.8.*
 
 before_install:
+  - if [[ "$TRAVIS_PHP_VERSION" != "5.6" && "$TRAVIS_PHP_VERSION" != "hhvm" ]]; then phpenv config-rm xdebug.ini; fi
   - composer self-update
   - if [ "$SYMFONY_VERSION" != "" ]; then composer require --dev --no-update symfony/symfony=$SYMFONY_VERSION; fi