Fix login error message

Respose for invalid credentials changed and login page
was no longer displaying the correct error message to
the user when invalid credentials were entered.

Resolves #72

Tested: Logged in with incorrect credentials and saw the
        correct message. Also logged in with an unreachable
        host and saw that that message was displaying
        correctly.

Change-Id: I65cc6d6a061986568aded09555c5f75bcd59fe56
Signed-off-by: beccabroek <beccabroek@gmail.com>

app/common/services/userModel.js

@@ -25,8 +25,8 @@ window.angular && (function(angular) {
                 response && response.data && response.data.data &&
                 response.data.data.description) {
               callback(false, response.data.data.description);
-            } else if (response && response.message) {
-              callback(false, response.message);
+            } else if (response && response.statusText) {
+              callback(false, response.statusText);
             } else if (error) {
               callback(false, 'Server unreachable');
             } else {

app/login/controllers/login-controller.js

@@ -46,7 +46,7 @@ window.angular && (function(angular) {
                 $window.location.href = next;
               }
             } else {
-              if (description === 'Invalid username or password') {
+              if (description === 'Unauthorized') {
                 $scope.invalidCredentials = true;
               } else {
                 $scope.serverUnreachable = true;