The LockService
      component is used to manage all locked nodes and allows unlocking the locked nodes in the system. It is also used
      to assign the Lock right to a user or a user group or a membership. The configuration of this component is found
      in 
        /core/core-configuration/src/main/webapp/WEB-INF/conf/wcm-core/core-services-configuration.xml.
    
<component>
<key>org.exoplatform.services.cms.lock.LockService</key>
<type>org.exoplatform.services.cms.lock.impl.LockServiceImpl</type>
</component>