[FrameworkBundle] Reuse definition variable in FormPass
merged branch franmomu/reuse_variable_formpass (PR #7464)

This PR was merged into the 2.1 branch.

Discussion
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[FrameworkBundle] Reuse definition variable in FormPass

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

Commits
-------

f52320d [FrameworkBundle] Reuse definition variable in FormPass
updated CHANGELOG for 2.1.9
update CONTRIBUTORS for 2.1.9
updated VERSION for 2.1.9
bumped Symfony version to 2.1.10-DEV
Merge branch '2.1' into 2.2

* 2.1:
  bumped Symfony version to 2.1.10-DEV
  updated VERSION for 2.1.9
  update CONTRIBUTORS for 2.1.9
  updated CHANGELOG for 2.1.9
  [FrameworkBundle] Reuse definition variable in FormPass

Conflicts:
	src/Symfony/Component/HttpKernel/Kernel.php