remove surplus namespace
because already defined in 'use' statement
remove deep namespace docblock
in ControllerLoaderFactory.php
Merge branch 'hotfix/3425'

Close #3425
Merge branch 'fix/unused-doc' of git://github.com/samsonasik/zf2 into hotfix/3473
Merge branch 'hotfix/3473' into develop

Forward port #3473