minor symfony#16222 [ci] Cache phpunit install (nicolas-grekas)

This PR was merged into the 2.3 branch.

Discussion
----------

[ci] Cache phpunit install

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

Commits
-------

e6d343a [ci] Cache phpunit install

Author: nicolas-grekas

.travis.yml

@@ -7,6 +7,10 @@ addons:
         - parallel
         - language-pack-fr-base
 
+cache:
+    directories:
+        - .phpunit
+
 matrix:
     include:
         - php: hhvm

appveyor.yml

@@ -20,16 +20,18 @@ install:
     - IF EXIST c:\php (SET PHP=0) ELSE (mkdir c:\php)
     - cd c:\php
     - IF %PHP%==1 appveyor DownloadFile http://windows.php.net/downloads/releases/archives/php-5.3.3-nts-Win32-VC9-x86.zip
-    - IF %PHP%==1 7z x php-5.3.3-nts-Win32-VC9-x86.zip -y > 7z.log
+    - IF %PHP%==1 7z x php-5.3.3-nts-Win32-VC9-x86.zip -y >nul
     - IF %PHP%==1 appveyor DownloadFile http://nebm.ist.utl.pt/~glopes/misc/intl_win/ICU-51.2-dlls.zip
-    - IF %PHP%==1 7z x ICU-51.2-dlls.zip -y > 7z.log
+    - IF %PHP%==1 7z x ICU-51.2-dlls.zip -y >nul
+    - IF %PHP%==1 del /Q *.zip
     - IF %PHP%==1 cd ext
     - IF %PHP%==1 appveyor DownloadFile http://nebm.ist.utl.pt/~glopes/misc/intl_win/php_intl-3.0.0-5.3-nts-vc9-x86.zip
-    - IF %PHP%==1 7z x php_intl-3.0.0-5.3-nts-vc9-x86.zip -y > 7z.log
+    - IF %PHP%==1 7z x php_intl-3.0.0-5.3-nts-vc9-x86.zip -y >nul
     - IF %PHP%==1 appveyor DownloadFile http://windows.php.net/downloads/pecl/releases/apcu/4.0.7/php_apcu-4.0.7-5.3-nts-vc9-x86.zip
-    - IF %PHP%==1 7z x php_apcu-4.0.7-5.3-nts-vc9-x86.zip -y > 7z.log
+    - IF %PHP%==1 7z x php_apcu-4.0.7-5.3-nts-vc9-x86.zip -y >nul
     - IF %PHP%==1 appveyor DownloadFile http://windows.php.net/downloads/pecl/releases/memcache/3.0.8/php_memcache-3.0.8-5.3-nts-vc9-x86.zip
-    - IF %PHP%==1 7z x php_memcache-3.0.8-5.3-nts-vc9-x86.zip -y > 7z.log
+    - IF %PHP%==1 7z x php_memcache-3.0.8-5.3-nts-vc9-x86.zip -y >nul
+    - IF %PHP%==1 del /Q *.zip
     - IF %PHP%==1 cd ..
     - IF %PHP%==1 echo @php %%~dp0composer.phar %%* > composer.bat
     - IF %PHP%==1 copy /Y php.ini-development php.ini-min

phpunit

@@ -24,14 +24,14 @@ if (!file_exists($COMPOSER = __DIR__.'/composer.phar')) {
 $PHP = ProcessUtils::escapeArgument($PHP);
 $COMPOSER = $PHP.' '.ProcessUtils::escapeArgument($COMPOSER);
 
-if (!file_exists("$PHPUNIT_DIR/phpunit-$PHPUNIT_VERSION/phpunit") || md5_file(__FILE__) !== @file_get_contents("$PHPUNIT_DIR/.md5") || (isset($argv[1]) && 'install' === $argv[1])) {
+if (!file_exists("$PHPUNIT_DIR/phpunit-$PHPUNIT_VERSION/phpunit") || md5_file(__FILE__) !== @file_get_contents("$PHPUNIT_DIR/.md5")) {
     // Build a standalone phpunit without symfony/yaml
 
     $oldPwd = getcwd();
     @mkdir($PHPUNIT_DIR);
     chdir($PHPUNIT_DIR);
     if (file_exists("phpunit-$PHPUNIT_VERSION")) {
-        passthru(sprintf('\\' === DIRECTORY_SEPARATOR ? 'del /S /F /Q %s & rmdir %1$s >nul 2>&1': 'rm -rf %s', "phpunit-$PHPUNIT_VERSION"));
+        passthru(sprintf('\\' === DIRECTORY_SEPARATOR ? '(del /S /F /Q %s & rmdir %1$s) >nul': 'rm -rf %s', "phpunit-$PHPUNIT_VERSION"));
     }
     if (extension_loaded('openssl') && ini_get('allow_url_fopen')) {
         stream_copy_to_stream(fopen("https://github.com/sebastianbergmann/phpunit/archive/$PHPUNIT_VERSION.zip", 'rb'), fopen("$PHPUNIT_VERSION.zip", 'wb'));
@@ -58,7 +58,7 @@ EOPHP
     );
     chdir('..');
     if (file_exists('../src/Symfony/Bridge/PhpUnit') && `git diff --name-only HEAD^ -- ../src/Symfony/Bridge/PhpUnit`) {
-        passthru(sprintf('\\' === DIRECTORY_SEPARATOR ? 'del /S /F /Q %s & rmdir %1$s >nul 2>&1': 'rm -rf %s', str_replace('/', DIRECTORY_SEPARATOR, "phpunit-$PHPUNIT_VERSION/vendor/symfony/phpunit-bridge")));
+        passthru(sprintf('\\' === DIRECTORY_SEPARATOR ? '(del /S /F /Q %s & rmdir %1$s) >nul': 'rm -rf %s', str_replace('/', DIRECTORY_SEPARATOR, "phpunit-$PHPUNIT_VERSION/vendor/symfony/phpunit-bridge")));
         symlink(realpath('../src/Symfony/Bridge/PhpUnit'), "phpunit-$PHPUNIT_VERSION/vendor/symfony/phpunit-bridge");
     }
     file_put_contents('.md5', md5_file(__FILE__));