Merge branch '2.3' into 2.7

* 2.3:
  use stable 1.0.x Composer versions

Author: nicolas-grekas

.travis.yml

@@ -51,7 +51,7 @@ before_install:
     - if [[ ! $skip && $PHP = 5.* ]]; then pecl install -f memcached-2.1.0; fi
     - if [[ ! $skip && $PHP != hhvm ]]; then echo extension = ldap.so >> $INI_FILE; fi
     - if [[ ! $skip && $PHP != hhvm ]]; then phpenv config-rm xdebug.ini; fi
-    - if [[ ! $skip ]]; then composer self-update; fi
+    - if [[ ! $skip ]]; then composer self-update --stable; fi
     - if [[ ! $skip ]]; then cp .composer/* ~/.composer/; composer global install; fi
     - if [[ ! $skip ]]; then ./phpunit install; fi
     - if [[ ! $skip && $deps ]]; then composer global remove hirak/prestissimo; fi

appveyor.yml

@@ -49,7 +49,7 @@ install:
     - IF %PHP%==1 echo extension=php_pdo_sqlite.dll >> php.ini-max
     - IF %PHP%==1 echo extension=php_curl.dll >> php.ini-max
     - IF %PHP%==1 echo curl.cainfo=c:\php\cacert.pem >> php.ini-max
-    - appveyor DownloadFile https://getcomposer.org/composer.phar
+    - IF %PHP%==1 appveyor DownloadFile https://getcomposer.org/download/1.0.2/composer.phar
     - copy /Y php.ini-max php.ini
     - cd c:\projects\symfony
     - mkdir %APPDATA%\Composer