Add link to check server connection to error page for api discovery

Fixes openshift/origin#4368

Author: jwforres

app/scripts/controllers/util/error.js

@@ -22,14 +22,21 @@ angular.module('openshiftConsole')
       case 'invalid_request':
         $scope.errorMessage = "Invalid request";
         break;
+      case 'API_DISCOVERY':
+        $scope.errorLinks = [{
+          href: window.location.protocol + "//" + window.OPENSHIFT_CONFIG.api.openshift.hostPort + window.OPENSHIFT_CONFIG.api.openshift.prefix,
+          label: "Check Server Connection",
+          target: "_blank"
+        }];
+        break;
       default:
         $scope.errorMessage = "An error has occurred";
     }
 
     if (params.error_description) {
       $scope.errorDetails = params.error_description;
     }
-    
+
     $scope.reloadConsole = function() {
       $window.location.href = "/";
     };

app/views/util/error.html

@@ -9,6 +9,10 @@
         <h1>Error</h1>
         <h4>{{errorMessage}}</h4>
         <div>{{errorDetails}}</div>
+        <div ng-if="errorLinks.length">
+          <a ng-repeat-start="link in errorLinks" ng-href="{{link.href}}" target="{{link.target || '_blank'}}">{{link.label}}</a>
+          <span ng-repeat-end ng-if="!$last" class="action-divider mar-right-xs">|</span>
+        </div>
         <br>
         <div>Return to the <a href="" ng-click="reloadConsole()">console</a>.</div>
       </div>

dist/scripts/scripts.js

@@ -7841,6 +7841,14 @@ case "invalid_request":
 a.errorMessage = "Invalid request";
 break;
 
+case "API_DISCOVERY":
+a.errorLinks = [ {
+href:window.location.protocol + "//" + window.OPENSHIFT_CONFIG.api.openshift.hostPort + window.OPENSHIFT_CONFIG.api.openshift.prefix,
+label:"Check Server Connection",
+target:"_blank"
+} ];
+break;
+
 default:
 a.errorMessage = "An error has occurred";
 }

dist/scripts/templates.js

@@ -11485,6 +11485,10 @@ angular.module('openshiftConsoleTemplates', []).run(['$templateCache', function(
     "<h1>Error</h1>\n" +
     "<h4>{{errorMessage}}</h4>\n" +
     "<div>{{errorDetails}}</div>\n" +
+    "<div ng-if=\"errorLinks.length\">\n" +
+    "<a ng-repeat-start=\"link in errorLinks\" ng-href=\"{{link.href}}\" target=\"{{link.target || '_blank'}}\">{{link.label}}</a>\n" +
+    "<span ng-repeat-end ng-if=\"!$last\" class=\"action-divider mar-right-xs\">|</span>\n" +
+    "</div>\n" +
     "<br>\n" +
     "<div>Return to the <a href=\"\" ng-click=\"reloadConsole()\">console</a>.</div>\n" +
     "</div>\n" +