Rework of Layered path resolutions that make snapshots of stores containing layers

actually capture the repository context at snapshot creation time. 
Gave ListEntry and MapEntry proper equals() and hashCode methods and backed out 
hibernate-cfg.properties changes.  Doh!  
Added cache configuration for AttributeService entities.
Did some warning removal in a few places.


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@5576 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

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

@@ -68,6 +68,7 @@
 		    	<!-- The is the moral equivalent of the value of a symlink. -->
 		    	<property name="indirection" column="indirection"
 		    		type="string" length="511" />
+		        <property name="indirectionVersion" type="int" column="indirection_version"/>
 		    	<!-- This marks a layered directory as either knowing itself what
 		    		it points at (true) or inheriting what it points at from its
 		    		container (false). -->
@@ -99,6 +100,7 @@
 				discriminator-value="layeredfile" proxy="LayeredFileNode" lazy="true">
 				<property name="indirection" type="string" length="511"
 					column="indirection" />
+			    <property name="indirectionVersion" type="int" column="indirection_version"/>
 			</subclass>
 		</subclass>
 	</class>
@@ -204,6 +206,17 @@
 		<many-to-one name="node" class="AVMNodeImpl" column="node_id" foreign-key="fk_avm_asp_node"/>
 		<property name="name" column="qname" type="QName" length="200"/>
 	</class>
+	<!-- When a snapshot is created we stow away all of the layered
+	     nodes that were frozen by the snapshot so that subsequent 
+	     snapshots can find them and force copies. -->
+	<class name="VersionLayeredNodeEntryImpl" proxy="VersionLayeredNodeEntry"
+	       table="avm_version_layered_node_entries">
+	    <composite-id>
+	        <key-many-to-one name="version" class="VersionRootImpl" column="version_root_id"/>
+	        <key-property name="md5Sum" type="string" length="32" column="md5sum"/>
+	    </composite-id>
+	    <property name="path" type="string" length="512" column="path"/>
+	</class>
     <query name="ChildEntry.DeleteByParent">
     <![CDATA[
     	delete ChildEntryImpl ce