Remove conflicting imports and resolve relative to root namespace

- No need to import Zend\ServiceManager\Initializer; it's a subnamespace
  of the current namespace already.
- Resolve AbstractFactoryInterface and DelegatorFactoryInterface
  relative to `Factory` subnamespace to prevent naming collisions. These
  only affect docblocks anyways. (Fixes issues observed in two separate,
  3rd party packages when testing against the class.)

Author: weierophinney

src/ServiceManager.php

@@ -22,9 +22,6 @@
 use Zend\ServiceManager\Exception\InvalidArgumentException;
 use Zend\ServiceManager\Exception\ServiceNotCreatedException;
 use Zend\ServiceManager\Exception\ServiceNotFoundException;
-use Zend\ServiceManager\Factory\AbstractFactoryInterface;
-use Zend\ServiceManager\Factory\DelegatorFactoryInterface;
-use Zend\ServiceManager\Initializer;
 
 /**
  * Service Manager.
@@ -44,7 +41,7 @@
 class ServiceManager implements ServiceLocatorInterface
 {
     /**
-     * @var AbstractFactoryInterface[]
+     * @var Factory\AbstractFactoryInterface[]
      */
     protected $abstractFactories = [];
 
@@ -70,7 +67,7 @@ class ServiceManager implements ServiceLocatorInterface
     protected $creationContext;
 
     /**
-     * @var string[][]|DelegatorFactoryInterface[][]
+     * @var string[][]|Factory\DelegatorFactoryInterface[][]
      */
     protected $delegators = [];
 
@@ -507,7 +504,7 @@ public function setShared($name, $flag)
     /**
      * Instantiate abstract factories for to avoid checks during service construction.
      *
-     * @param string[]|AbstractFactoryInterface[] $abstractFactories
+     * @param string[]|Factory\AbstractFactoryInterface[] $abstractFactories
      *
      * @return void
      */
@@ -518,7 +515,7 @@ private function resolveAbstractFactories(array $abstractFactories)
                 $abstractFactory = new $abstractFactory();
             }
 
-            if ($abstractFactory instanceof AbstractFactoryInterface) {
+            if ($abstractFactory instanceof Factory\AbstractFactoryInterface) {
                 $this->abstractFactories[] = $abstractFactory;
                 continue;
             }