title: Grails 2.3 IntegrationSpec cannot be transactional false
body: <p>I upgrade to Grails 2.3 recently and try to migrate all old tests to spock integration test. But it fails at cleanup because my test is non-transactional. The Grails doc says test can be non-transactional, but we need to handle it manually, but it seems not quite right here. as I am getting this error in every integration test extending IntegrationSpec</p>
  
  <pre><code>java.lang.IllegalStateException: Cannot deactivate transaction synchronization - not active
      at grails.test.spock.IntegrationSpec.cleanup(IntegrationSpec.groovy:72)
  </code></pre>
  
  <p>A simple test like this would throw that error:</p>
  
  <pre><code>import grails.test.spock.IntegrationSpec
  
  public class DummySpec extends IntegrationSpec {
     static transactional = false
  
     def setup() {
     }
  
     def cleanup() {
     }
  
     def testDummy() {
        expect:
        1 == 1
     }
  }
  </code></pre>