fix travis to not include mongo for 7.1, fix build matrex ordering so…

… symfony 3.2.x isnt overridden by later COMPOSER_FLAGS usage

.travis.yml

@@ -30,10 +30,10 @@ matrix:
       env: SYMFONY_VERSION=3.0.*@dev
     - php: 5.6
       env: SYMFONY_VERSION=3.1.*@dev
-    - php: 5.3
-      env: COMPOSER_FLAGS="--prefer-lowest"
     - php: 7.0
       env: SYMFONY_VERSION=3.2.x-dev
+    - php: 5.3
+      env: COMPOSER_FLAGS="--prefer-lowest"
   allow_failures:
     - php: 7.0
       env: SYMFONY_VERSION=3.2.x-dev
@@ -43,7 +43,7 @@ before_install:
   - if [ "${TRAVIS_PHP_VERSION}" != "hhvm" ]; then echo "memory_limit = -1" >> ~/.phpenv/versions/$(phpenv version-name)/etc/conf.d/travis.ini; fi;
   - if [ "${SYMFONY_VERSION:0:3}" == "2.3" ]; then composer remove --dev friendsofphp/php-cs-fixer --no-update; fi;
   - if [ "${TRAVIS_PHP_VERSION}" != "hhvm" ] && [ "${TRAVIS_PHP_VERSION}" != "5.3" ]; then composer require --dev league/flysystem:~1.0 --no-update; fi;
-  - if [ "${TRAVIS_PHP_VERSION}" != "hhvm" ] && [ "${TRAVIS_PHP_VERSION}" != "7.0" ]; then composer require --dev doctrine/mongodb-odm:~1.0 --no-update; yes "" | pecl -q install -f mongo; fi;
+  - if [ "${TRAVIS_PHP_VERSION}" != "hhvm" ] && [ "${TRAVIS_PHP_VERSION:0:1}" != "7" ]; then composer require --dev doctrine/mongodb-odm:~1.0 --no-update; yes "" | pecl -q install -f mongo; fi;
   - if [ "${SYMFONY_VERSION:-x}" != "x" ]; then composer require "symfony/symfony:${SYMFONY_VERSION}" --no-update; fi;
 
 install: composer update --prefer-source $COMPOSER_FLAGS