Handle the deprecation of IntlDateFormatter::setTimeZoneId() in PHP 5.5.

Optionally use the new IntlDateFormatter::setTimeZone() method if it exists.
Fix version_compare() calls for PHP 5.5.

Until PHP 5.5 hits beta, the version number for Git builds is still 5.5.0-dev,
which is less than 5.5.0alpha1 according to version_compare(). This means that
the branches for 5.5 aren't being executed on 5.5 snapshots at present.
Removed underscores from test method names to be consistent with other components.

It is more common to use fully camel-cased names for test methods. Only some of the test methods are called with underscore notation. To avoid confusion it is better to be consistent.
merged branch LawnGnome/PHP-5.5-compat (PR #6647)

This PR was merged into the 2.1 branch.

Commits
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4991607 Fix version_compare() calls for PHP 5.5.
34def9f Handle the deprecation of IntlDateFormatter::setTimeZoneId() in PHP 5.5.

Discussion
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[Form] [Locale] PHP 5.5 compatibility fixes

Bug fix: yes
Feature addition: no
Backwards compatibility break: no
Symfony2 tests pass: yes
Fixes the following tickets: N/A
Todo: None
License of the code: MIT
Documentation PR: N/A

IntlDateFormatter::setTimeZoneId() is deprecated in PHP 5.5, which results in E_DEPRECATED errors when using the date form type. This PR works around that.

Furthermore, the version_compare() tests used in locale to detect PHP 5.5 are broken with snapshot and Git builds of PHP. I've also committed a fix for those tests in this PR.

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by stof at 2013-01-10T08:24:15Z

shouldn't it even be done in 2.0 as it is a bugfix ?

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by LawnGnome at 2013-01-11T00:49:11Z

Possibly — I don't know enough about Symfony's release management to know whether this is appropriate for 2.0, and I was mostly scratching my own itch, honestly.

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by stof at 2013-01-11T01:51:35Z

well, it is a bugfix and 2.0 is also impacted, so it should be done in it.

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by LawnGnome at 2013-01-11T02:52:21Z

The diff for 2.0 looks like it'll be just the StubIntlDateFormatter.php changes — the deprecated method isn't called in DateType on that branch, and there aren't any StubIntlDateFormatter tests on 2.0. How do you want that submitted — as a separate PR against 2.0?

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by fabpot at 2013-01-11T07:20:18Z

@LawnGnome A separate pull request would be good. Thanks.

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by LawnGnome at 2013-01-11T08:29:48Z

2.0 PR added as #6699.