MAGETWO-33443: Password strength validator on installation wizard works in over-exacting mode

- fixed required length of the password

Author: Olga Kopylova

setup/view/magento/setup/create-admin-account.phtml

@@ -15,7 +15,7 @@ $passwordWizard = sprintf(
         </div>
     <p>%s</p>',
     'Password Strength:',
-    'Enter 7 or more characters. For a strong password, use a mix of numbers, symbols, and uppercase and lowercase letters (Ex: BuyIt$54).'
+    'Enter 6 or more characters. For a strong password, use a mix of numbers, symbols, and uppercase and lowercase letters (Ex: BuyIt$54).'
 );
 ?>
 
@@ -141,7 +141,7 @@ $passwordWizard = sprintf(
                 >
             <div class="error-container">
                 <span ng-show="account.adminPassword.$error.checkPassword">
-                    Please enter a mix of at least 7 alpha-numeric characters.
+                    Please enter a mix of at least 6 alpha-numeric characters.
                 </span>
                 <span ng-show="account.adminPassword.$error.required">
                     Please enter your new password.