MAGETWO-51927: Setup crons out of memory issue

- fixed message

Author: Ivan Gavryshko

setup/src/Magento/Setup/Model/PhpReadinessCheck.php

@@ -200,7 +200,7 @@ public function checkMemoryLimit()
         ) {
             $error = true;
             $message = sprintf(
-                'Your current PHP memory limit is memory_limit=%s.
+                'Your current PHP memory limit is %s.
                  Magento 2 requires it to be set to %s or more.
                  As a user with root privileges, edit your php.ini file to increase memory_limit. 
                  (The command php --ini tells you where it is located.) 
@@ -215,7 +215,7 @@ public function checkMemoryLimit()
         ) {
             $warning = true;
             $message = sprintf(
-                'Your current PHP memory limit is memory_limit=%s.
+                'Your current PHP memory limit is %s.
                  We recommend it to be set to %s or more to use Setup Wizard.
                  As a user with root privileges, edit your php.ini file to increase memory_limit. 
                  (The command php --ini tells you where it is located.)