if no credentials are provided, set them to something to remind the u…

…ser to manually set them

modules/hawkular-wildfly-agent-download/src/main/java/org/hawkular/component/wildflymonitor/WildFlyAgentServlet.java

@@ -206,6 +206,16 @@ private void downloadAgentInstaller(HttpServletRequest req, HttpServletResponse
                 encode(newProperties, AGENT_INSTALLER_PROPERTY_SECURITY_SECRET, encryptionKey);
             }
 
+            // if neither username or security key is provided, set them to something to indicate
+            // to the user that they need to manually set it.
+            if (newProperties.get(AGENT_INSTALLER_PROPERTY_USERNAME) == null &&
+                    newProperties.get(AGENT_INSTALLER_PROPERTY_SECURITY_KEY) == null) {
+                newProperties.put(AGENT_INSTALLER_PROPERTY_USERNAME, "SET_ME");
+                newProperties.put(AGENT_INSTALLER_PROPERTY_PASSWORD, "SET_ME");
+                newProperties.put(AGENT_INSTALLER_PROPERTY_SECURITY_KEY, null);
+                newProperties.put(AGENT_INSTALLER_PROPERTY_SECURITY_SECRET, null);
+            }
+
             int contentLength = 0;
 
             try (ZipFile agentInstallerZip = new ZipFile(agentInstallerJar);