Extending the phpunit-version-unsupported error message

The original message did not provide any further pointers as to
what someone should do or look for, other than change their
version of phpunit (up? down?). This commit fixes that.
added option to disable word wrap in DocBlockGenerator
added phpunit group annotation
Merge pull request #3736 from Freeaqingme/phpunitSupportVersion

Extending the phpunit-version-unsupported error message
Merge commit 'refs/pull/3766/head' of github.com:zendframework/zf2 into hotfix/disable-wordwrap-option
Forward #3766