[Debug] made order of suggestions predictable in error messages
[Debug] fixed case differences between PHP and HHVM (classes are case-insensitive anyway in PHP)
[Routing] fixed CS
minor #10186 Made some HHVM-related fixes (fabpot)

This PR was merged into the 2.5-dev branch.

Discussion
----------

Made some HHVM-related fixes

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

Commits
-------

1240758 [Routing] fixed CS
e223395 [Debug] fixed case differences between PHP and HHVM (classes are case-insensitive anyway in PHP)
23acc24 [Debug] made order of suggestions predictable in error messages