fixed #146 - don't reset user prefs on logout

Author: paxtonhare

quick-start/src/main/java/com/marklogic/hub/web/controller/api/DataHubServerApiController.java

@@ -127,7 +127,6 @@ public LoginForm getLoginStatus(HttpSession session) {
     public LoginForm postLogout(HttpSession session) {
         LoginForm loginForm = (LoginForm) session.getAttribute("loginForm");
         loginForm.setLoggedIn(false);
-        this.environmentConfiguration.removeSavedConfiguration();
         this.retrieveEnvironmentConfiguration(loginForm);
 
         session.invalidate();