Extract nested collection child fieldsets
add space
Add CanBindObjectAndPopulateAndExtractNestedFieldsets test
Implemented curcular alias reference detection

ServiceManagers that allow overwriting the service definition may
contain circular references which will cause an infinite loop. 
Extracted alias resolving code to a protected method that will detect
circular references.
cs fix
Removed unneccessary import for exception class
Fixed typo in unit test covers annotation
Added check for circular alias reference to setAlias()
Fix Zend\Config tests when missing ext/intl
Fix Zend\Filter tests when missing ext/intl
Fix Zend\Form tests when missing ext/intl
Fix Zend\Log tests when missing ext/intl
Fix Zend\InputFilter tests when missing ext/intl
Fix Zend\Validator tests when missing ext/intl
Fix Zend\View tests when missing ext/intl
Fix Zend\I18n tests when missing ext/intl
Suit PSR-2 coding style
[http] Adapt header field name validation to RFC definition
[#5013] Remove custom code response tests

Since #5013 custom response codes can be assigned directly without need to extend the class.
import lost exceptions