Merge pull request #3687 branch 'hotfix/phpdoc-return-type'
Zend\Db\Adapter\ParameterContainer
- Fixed ParameterContainer to, upon offsetSet, map int-indexed parameter to named-parameter
Zend\Db\Adapter\ParameterContainer
- Added more tests and a situation for null insertion
Merge branch 'hotfix/3692' into develop

Forward port #3692