GRAILS-9170 Fix cascading saves on multiple levels

Cascading saves were broken for "multiple levels" with Hibernate 2nd level cache disabled
and using some other id generator than 'identity'.

grails-hibernate/src/main/groovy/org/codehaus/groovy/grails/orm/hibernate/support/ClosureEventTriggeringInterceptor.java

@@ -271,7 +271,7 @@ protected Serializable performSaveOrReplicate(Object entity, EntityKey key, Enti
             if (!useIdentityColumn) {
                 EntityInsertAction insert = new EntityInsertAction(id, values, entity, version, persister, source); 
                 source.getActionQueue().execute(insert);
-                if(!source.getPersistenceContext().wasInsertedDuringTransaction(persister, id)) {
+                if(persister.hasCache() && !source.getPersistenceContext().wasInsertedDuringTransaction(persister, id)) {
                     insertVetoed=true;
                 }
             }

grails-test-suite-persistence/src/test/groovy/org/codehaus/groovy/grails/orm/hibernate/CascadingSaveAndNonIdentityGeneratedIdTests.groovy

@@ -0,0 +1,75 @@
+package org.codehaus.groovy.grails.orm.hibernate
+
+class CascadingSaveAndNonIdentityGeneratedIdTests extends AbstractGrailsHibernateTests {
+
+    protected void onSetUp() {
+        gcl.parseClass '''
+package cascadingsave
+
+import grails.persistence.Entity
+
+@Entity
+class Request {
+    static hasMany = [samples: Sample]
+    
+    Date dateCreated
+    Date lastUpdated
+    
+    static mapping = {
+        cache false
+        id generator: 'increment'
+    }
+}
+
+@Entity
+class Sample {
+    static belongsTo = [request : Request]
+    static hasMany = [attributes: Attribute]
+
+    static mapping = {
+        cache false
+        id generator: 'increment'
+    }
+}
+
+@Entity
+class Attribute {
+    static belongsTo = [sample : Sample]
+
+    static mapping = {
+        cache false
+        id generator: 'increment'
+    }
+}
+'''
+      println "Parsed!"
+    }
+
+    void testCascadingSaveToMultipleLevels() {
+        def requestClass = ga.getDomainClass("cascadingsave.Request").clazz
+        def sampleClass = ga.getDomainClass("cascadingsave.Sample").clazz
+        def attributeClass = ga.getDomainClass("cascadingsave.Attribute").clazz
+
+        def request = requestClass.newInstance()
+
+        10.times {
+            def sample = sampleClass.newInstance()
+            request.addToSamples(sample)
+            10.times {
+                sample.addToAttributes(attributeClass.newInstance())
+            }
+        }
+
+        request.save(flush:true)
+
+        requestClass.withNewSession {
+            def savedRequest = requestClass.get(request.id)
+            assert savedRequest.samples.size() == 10
+            savedRequest.samples.each {
+                assert it.attributes.size() == 10
+            }
+        }
+
+
+    }
+}