Forward port #3830
Forward port #3883
Forward port #3841
Merge branch 'hotfix/3827' into develop

Forward port #3827
Add removeMethod method
Add unit test
Merge branch 'hotfix/yaml-dev-version' into develop

Fixes for symfony/yaml autoloading
first stab at localized date validation
Removed debug.
Merge branch 'weierophinney-hotfix/polyfill-via-class-alias' into develop

PR #3966
Deprecating the Placeholder singleton registry
Merge branch 'bramstroker-master' into develop

PR #3924 - https://github.com/zendframework/zf2/pull/3924
Rewriten into a generic DateTime validator and a preconfigured Date and Time validator
Merge branch 'hotfix/phpunit' into develop

PHPUnit upgrade fixes dependency issues
Merge branch 'hotfix/3984' into develop

Forward port #3984
Merge branch 'bramstroker-master' into develop
Missed on place that the placeholder registry is unset
added possibility to maintain original file extension using rename upload filter
Move loading module by name in an other method
Minor improvement in validation of configuration.

Change-Id: I8e342727e72db510a45b885ddb293ceef4590510