Merge branch '6.4' into 7.0

* 6.4:
  [SecurityBundle] Remove unused memory users’ `name` attribute from the XSD

Author: nicolas-grekas

Resources/config/schema/security-1.0.xsd

@@ -112,7 +112,6 @@
 
     <xsd:complexType name="user">
         <xsd:attribute name="identifier" type="xsd:string" />
-        <xsd:attribute name="name" type="xsd:string" />
         <xsd:attribute name="password" type="xsd:string" />
         <xsd:attribute name="roles" type="xsd:string" />
     </xsd:complexType>