Revert "Upgrade Symfony to dev-master"

This reverts commit f2b5581.

Author: bocharsky-bw

composer.json

@@ -25,7 +25,7 @@
         "symfony/monolog-bundle"               : "^3.0",
         "symfony/polyfill-apcu"                : "^1.0",
         "symfony/swiftmailer-bundle"           : "^2.3",
-        "symfony/symfony"                      : "dev-master",
+        "symfony/symfony"                      : "^3.2",
         "twig/extensions"                      : "^1.3",
         "twig/twig"                            : "^1.28 || ^2.0",
         "white-october/pagerfanta-bundle"      : "^1.0"