Merge branch 'hotfix/4204' into develop

Close #4204
Fixes #4202
Merge branch 'hotfix/4207' into develop

Forward port #4207
Merge branch 'hotfix/4210' into develop

Forward port #4210
Implementing first version of delegate factories for services
Allowing multiple wrapped delegates
Minor CS fixes
Fixing problem with 5.3 compatibility (wrong context for $this)
Renaming 'delegates' => 'delegators'
Renaming 'delegates' => 'delegators'
Merge branch 'hotfix/4213' into develop

Forward port #4213
Merge branch 'hotfix/4216' into develop

Forward port #4216
Implementing first version of delegate factories for services
Renaming 'delegates' => 'delegators'
Adding support for lazy services
Verifying proxy initialization
Rebasing, bumping proxy manager version
Rebase adjustments
Defaulting the proxy generator so that no proxies are written
Removing minimum stability flag
made Zend\Http\Client not keeping http authentication on redirects to foreign servers