Allow other types of content URLs other than store://...

Enforce restriction that all content URLs must be of form protocol://identifier
Allow for read-only stores.
Improved tests so that it is easier, when writing a new store, to determine if the store is compliant or not.


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@5899 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/content/RoutingContentServiceTest.java

@@ -271,7 +271,7 @@ public class RoutingContentServiceTest extends TestCase
     
     public void testGetRawReader() throws Exception
     {
-        ContentReader reader = contentService.getRawReader("blah");
+        ContentReader reader = contentService.getRawReader("test://non-existence");
         assertNotNull("A reader is expected with content URL referencing no content", reader);
         assertFalse("Reader should not have any content", reader.exists());
         // Now write something