Removed pecl_http for PHP5.3 and allow failures for 5.3 (since it's EOL anyway)

.travis.yml

@@ -16,7 +16,7 @@ env:
   - SYMFONY_VERSION=2.5.*
 
 before_script:
-  - bash -c "if [ $TRAVIS_PHP_VERSION != 'hhvm' ] && [ $TRAVIS_PHP_VERSION != 'hhvm-nightly' ]; then printf '\n\n\n\n' | pecl install pecl_http-1.7.6; fi"
+  - bash -c "if [ $TRAVIS_PHP_VERSION != 'hhvm' ] && [ $TRAVIS_PHP_VERSION != 'hhvm-nightly' ] && [ $TRAVIS_PHP_VERSION != '5.3' ]; then printf '\n\n\n\n' | pecl install pecl_http-1.7.6; fi"
   - composer require --prefer-source --dev symfony/event-dispatcher:${SYMFONY_VERSION}
 
 script: vendor/bin/phpunit -c phpunit.xml.travis -v
@@ -25,5 +25,6 @@ after_script: vendor/bin/coveralls -v
 
 matrix:
   allow_failures:
+      - php: 5.3
       - php: hhvm
       - php: hhvm-nightly
\ No newline at end of file