Merge branch 'hotfix/4207'

Close #4207
Merge branch 'hotfix/4207' into develop

Forward port #4207
Merge pull request #4210 from tux-rampage/rbac-issue

Fixed failure when implementing custom rbac roles
[#4210] CS fix

- docblock can simply refer to "self"
Merge branch 'hotfix/4210'

Close #4210
Merge branch 'hotfix/4210' into develop

Forward port #4210
[Curl] setOptions should merge config items that can be arrays
[#4213] Added group annotation to test

- to make it easier to run individual test. HTTP online tests are a
  pain!
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'

Close #4213
Merge branch 'hotfix/4213' into develop

Forward port #4213
Merge pull request #4216 from Danizord/hotfix/config-dependency-in-mvc

Require Zend\Config in Zend\Mvc
Merge branch 'hotfix/4216'

Close #4216
Fixes #3908
Merge branch 'hotfix/4216' into develop

Forward port #4216
Add Filter\FilterChain unit test to test if filter priorities are kept when merging one filterChain into another.