HER-2015 credentials cached to server never used

* FetchHTTP.java
    populateCredentials() - return true when credentials populated from server cache

modules/src/main/java/org/archive/modules/fetcher/FetchHTTP.java

@@ -1143,17 +1143,20 @@ public class FetchHTTP extends Processor implements Lifecycle {
         } catch (URIException e) {
             return false;
         }
+        
+        boolean result = false;
+        
         CrawlServer server = serverCache.getServerFor(serverKey);
         if (server.hasCredentials()) {
             for (Credential cred : server.getCredentials()) {
                 if (cred.isEveryTime()) {
-                    cred.populate(curi, this.http, method);
+                    if (cred.populate(curi, this.http, method)) {
+                        result = true;
+                    }
                 }
             }
         }
 
-        boolean result = false;
-
         // Now look in the curi. The Curi will have credentials loaded either
         // by the handle401 method if its a rfc2617 or it'll have been set into
         // the curi by the preconditionenforcer as this login uri came through.