bug symfony#17279 [2.7][FrameworkBundle] Add case in Kernel directory guess for PHPUnit (tgalopin)

This PR was merged into the 2.7 branch.

Discussion
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[2.7][FrameworkBundle] Add case in Kernel directory guess for PHPUnit

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

The current automatic guess of the Kernel directory in the context of PHPUnit does work properly using the following commands:

- `phpunit -c app`
- `phpunit --configuration app`
- `phpunit --configuration=app`

But it fails with the synthax `phpunit -capp`, even if PHPUnit supports it. This PR fixes this.

See symfony#17272.

Commits
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a7b7766 [FrameworkBundle] Add case in Kernel directory guess for PHPUnit

Author: fabpot

src/Symfony/Bundle/FrameworkBundle/Test/KernelTestCase.php

@@ -79,10 +79,14 @@ private static function getPhpUnitCliConfigArgument()
             if (preg_match('/^-[^ \-]*c$/', $testArg) || $testArg === '--configuration') {
                 $dir = realpath($reversedArgs[$argIndex - 1]);
                 break;
-            } elseif (strpos($testArg, '--configuration=') === 0) {
+            } elseif (0 === strpos($testArg, '--configuration=')) {
                 $argPath = substr($testArg, strlen('--configuration='));
                 $dir = realpath($argPath);
                 break;
+            } elseif (0 === strpos($testArg, '-c')) {
+                $argPath = substr($testArg, strlen('-c'));
+                $dir = realpath($argPath);
+                break;
             }
         }