title: Grails 2.1.0, Spring Security Core - SpringSecurityUtils No Such Property
body: <p>I have a grails 2.1.0 application with Spring Security Core and Multi-tenant single db plugin working fine. One of the requirements for this application is to limit concurrent logins to just one. For this, I'm trying to use SpringSecurityUtils in Bootstrap to register a filter. </p>
  
  <pre><code> SpringSecurityUtils.clientRegisterFilter('concurrencyFilter', SecurityFilterPosition.CONCURRENT_SESSION_FILTER)
  </code></pre>
  
  <p>SpringSecurityUtils is static and as the documentation says, need not be injected, but on executing, it errors out</p>
  
  <pre><code>ERROR context.GrailsContextLoader  - Error executing bootstraps: No such property: SpringSecurityUtils for class: BootStrap
  </code></pre>
  
  <p>Message: No such property: SpringSecurityUtils for class: BootStrap
     Line | Method
  ->>  17 | doCall                           in BootStrap$_closure1</p>
  
  <hr>
  
  <p>|   301 | evaluateEnvironmentSpecificBlock in grails.util.Environment
  |   294 | executeForEnvironment . . . . .  in     ''
  |   270 | executeForCurrentEnvironment     in     ''
  |   303 | innerRun . . . . . . . . . . . . in java.util.concurrent.FutureTask$Sync
  |   138 | run                              in java.util.concurrent.FutureTask
  |   886 | runTask . . . . . . . . . . . .  in java.util.concurrent.ThreadPoolExecutor$Worker
  |   908 | run                              in     ''
  ^   662 | run . . . . . . . . . . . . . .  in java.lang.Thread</p>
  
  <p>Spring security is otherwise working fine. </p>
  
  <p>Any help is much appreciated.</p>