Merge branch '4.4' into 5.0

* 4.4:
  [DoctrineBridge] [DX] Improve condition for exception text in ManagerRegistry to avoid confusion
  Fix testing with mongodb
  suggest a non-deprecated function replacement
  Minor Travis cosmetic patch
  [Cache] fix checking for igbinary availability
  [HttpKernel] Check if lock can be released
  Fixes a runtime error (Impossible to access an attribute ("value") on a double variable...) when accessing the cache panel (@see #35419)
  bumped Symfony version to 4.4.4
  updated VERSION for 4.4.3
  updated CHANGELOG for 4.4.3
  bumped Symfony version to 4.3.11
  updated VERSION for 4.3.10
  updated CHANGELOG for 4.3.10
  bumped Symfony version to 3.4.38
  updated VERSION for 3.4.37
  update CONTRIBUTORS for 3.4.37
  updated CHANGELOG for 3.4.37
  [FrameworkBundle] Add --show-arguments example to debug:container command help text

Author: nicolas-grekas

Kernel.php

@@ -553,7 +553,10 @@ public function release()
         }
 
         $this->dumpContainer($cache, $container, $class, $this->getContainerBaseClass());
-        $cache->release();
+        if (method_exists($cache, 'release')) {
+            $cache->release();
+        }
+
         $this->container = require $cachePath;
         $this->container->set('kernel', $this);