bug symfony#18943 [Ldap][Security] The Ldap user provider abstract service now has the correct number of arguments (csarrazi)

This PR was merged into the 3.1 branch.

Discussion
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[Ldap][Security] The Ldap user provider abstract service now has the correct number of arguments

| Q             | A
| ------------- | ---
| Branch?       | 3.1
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | symfony#18933
| License       | MIT
| Doc PR        | none

Commits
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58996ac Fixed issue with missing argument in the abstract service definition for the ldap user provider

Author: fabpot

src/Symfony/Bundle/SecurityBundle/Resources/config/security.xml

@@ -127,6 +127,7 @@
             <argument /> <!-- default_roles -->
             <argument /> <!-- uid key -->
             <argument /> <!-- filter -->
+            <argument /> <!-- password_attribute -->
         </service>
 
         <service id="security.user.provider.chain" class="Symfony\Component\Security\Core\User\ChainUserProvider" abstract="true" public="false" />