Support for linking and unlinking rules.

- Link and unlink actions avaible to allow one rule node to reuse the rule set from another rule set.
- Methods added to rule service API to get information about linked to and linked from rule nodes.

Note: 
- The action execution queue REST API can be used to call the link and unlink actions.
- The rule set REST API needs to be extended to provid information about what links to and from a rule node.



git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@18670 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/rule/RuntimeRuleService.java

@@ -27,6 +27,7 @@ package org.alfresco.repo.rule;
 import java.util.Set;
 
 import org.alfresco.repo.rule.RuleServiceImpl.ExecutedRuleData;
+import org.alfresco.service.cmr.repository.ChildAssociationRef;
 import org.alfresco.service.cmr.repository.NodeRef;
 import org.alfresco.service.cmr.rule.Rule;
 import org.alfresco.service.cmr.rule.RuleType;
@@ -45,4 +46,6 @@ public interface RuntimeRuleService
 	void executePendingRules();	
 	
 	void registerRuleType(RuleType ruleType);
+	
+	ChildAssociationRef getSavedRuleFolderAssoc(NodeRef nodeRef);
 }