Marking of AVM Nodes with Aspects works (according to some minimal tests).

Schema has been updated, DAO written, garbage collection updated to clean
out aspects.  Also some seemingly unnecessary changes in visibility 
declarations to deal with strange intermittent Spring wiring failures in 
one of my tests.


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/BRANCHES/WCM-DEV2/root@3560 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/avm/hibernate/AVM.hbm.xml

@@ -102,7 +102,6 @@
 		<property type="int" name="nextVersionID"
 			column="next_version_id" not-null="true"/>
 		<!-- Every AVMStore has a root directory that is the current root directory. -->
-		<!-- This should be not-null but hibernate (or my own idiocy) makes that difficult. -->
 		<many-to-one name="root" class="DirectoryNodeImpl"
 			column="current_root_id" unique="true" cascade="save-update">
 		</many-to-one>
@@ -199,7 +198,14 @@
             <property name="stringValue" column="string_value" type="string" length="1024"/>
             <property name="serializableValue" column="serializable_value" type="serializable" length="16384"/>
        </component>
-	</class>		
+	</class>
+	<!-- Aspect name table for AVM Nodes. -->		
+	<class name="AVMAspectNameImpl" proxy="AVMAspectName" table="avm_aspects">
+		<composite-id>
+			<key-many-to-one name="node" class="AVMNodeImpl" column="node_id"/>
+			<key-property name="name" column="qname" type="QName" length="200"/>
+		</composite-id>
+	</class>
 	<query name="ChildEntry.ByNameParent">
 	<![CDATA[
 		from ChildEntryImpl ce