Merge branch 'feature/#6923-allow-datetime-cookie-expires'

Close #6923
added zendframework/zend-cache into Zend\XmlRpc's composer.json
to support Zend\\XmlRpc\\Server\\Cache usage
Merge branch 'dependencies/#6932-zend-xmlrpc-may-require-zend-cache' into develop

Close #6932
Forward port #6932