Made the ThreadPoolExecutorFactory more configurable, but also with more sensible defaults.

- The queue for background jobs is unlimited
 - A smaller number of core threads is maintained
 - It is possible to set the threads' priority (default low)
Added hasAspect() method to XPath functions.
Various other cosmetic changes.


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@6146 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/domain/Node.java

@@ -24,7 +24,6 @@
  */
 package org.alfresco.repo.domain;
 
-import java.util.Collection;
 import java.util.Map;
 import java.util.Set;
 
@@ -71,8 +70,6 @@ public interface Node
 
     public Set<QName> getAspects();
     
-//    public Collection<ChildAssoc> getParentAssocs();
-
     public Map<QName, PropertyValue> getProperties();
 
     public DbAccessControlList getAccessControlList();