BAP-16323: Upgrade minimum required php version to 7.1

- fix requirements constant
- remove unused hacks from SecurityBundle
- update UPGRAGE.md file for commerce-ee

.travis.yml

@@ -8,7 +8,6 @@ branches:
     - /^\d+\.\d+$/
 
 php:
-    - 7.0
     - 7.1
 
 cache:

src/Oro/Bundle/SecurityBundle/OroSecurityBundle.php

@@ -26,24 +26,6 @@
 
 class OroSecurityBundle extends Bundle
 {
-    /**
-     * {@inheritdoc}
-     */
-    public function __construct()
-    {
-        // Replace original Acl\Domain\Entry on custom class
-        // to avoid php7 issue with unserialization of the reference object
-        // https://bugs.php.net/bug.php?id=71940
-        if (version_compare(PHP_VERSION, '7.0.0', '>=') && version_compare(PHP_VERSION, '7.0.6', '<')
-            && !class_exists('Symfony\Component\Security\Acl\Domain\Entry', false)
-        ) {
-            class_alias(
-                'Oro\Bundle\SecurityBundle\Acl\Domain\Entry',
-                'Symfony\Component\Security\Acl\Domain\Entry'
-            );
-        }
-    }
-
     /**
      * {@inheritdoc}
      */

src/Oro/Bundle/WorkflowBundle/Tests/Unit/Field/FieldProviderTest.php

@@ -285,14 +285,7 @@ public function getFieldsWithVirtualRelationsAndEnumsDataProvider()
             ]
         ];
 
-        /**
-         * Changed expected result according to changes
-         * in user defined sorting algorithm in php7
-         * https://bugs.php.net/bug.php?id=69158
-         */
-        if (version_compare(PHP_VERSION, '7.0.0') >= 0) {
-            array_splice($expectedResult[0][0], 0, 2, [ $expectedResult[0][0][1], $expectedResult[0][0][0] ]);
-        }
+        array_splice($expectedResult[0][0], 0, 2, [ $expectedResult[0][0][1], $expectedResult[0][0][0] ]);
 
         return $expectedResult;
     }