Added LIST constraint

- An optionally case-insensitive list of supported values
 - Supports any types that can be converted to String by our type-converter.
Simple parameter values for constraints must not be in a <value> element, just like Spring properties (sorry)
Constraint parameters of type java.util.List are now supported:
   <list>
      <value>
      <value>
   </list>


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@2660 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/dictionary/constraint/RegexConstraint.java

@@ -20,7 +20,6 @@ import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
 import org.alfresco.service.cmr.dictionary.ConstraintException;
-import org.alfresco.service.cmr.dictionary.DictionaryException;
 import org.alfresco.service.cmr.repository.datatype.DefaultTypeConverter;
 
 /**
@@ -94,13 +93,11 @@ public class RegexConstraint extends AbstractConstraint
     {
         this.requiresMatch = requiresMatch;
     }
-
+    
     public void initialize()
     {
-        if (expression == null)
-        {
-            throw new DictionaryException(AbstractConstraint.ERR_PROP_NOT_SET, "expression");
-        }
+        checkPropertyNotNull("expression", expression);
+
         this.patternMatcher = Pattern.compile(expression);
     }