tech(): fixed broken tests due to angularjs upgrade

public/app/plugins/datasource/cloudwatch/specs/datasource_specs.ts

@@ -21,6 +21,7 @@ describe('CloudWatchDatasource', function() {
     ctx.$httpBackend =  $httpBackend;
     ctx.$rootScope = $rootScope;
     ctx.ds = $injector.instantiate(CloudWatchDatasource, {instanceSettings: instanceSettings});
+    $httpBackend.when('GET', /\.html$/).respond('');
   }));
 
   describe('When performing CloudWatch query', function() {

public/app/plugins/datasource/elasticsearch/specs/datasource_specs.ts

@@ -12,11 +12,13 @@ describe('ElasticDatasource', function() {
   beforeEach(angularMocks.module('grafana.core'));
   beforeEach(angularMocks.module('grafana.services'));
   beforeEach(ctx.providePhase(['templateSrv', 'backendSrv']));
+
   beforeEach(angularMocks.inject(function($q, $rootScope, $httpBackend, $injector) {
     ctx.$q = $q;
     ctx.$httpBackend =  $httpBackend;
     ctx.$rootScope = $rootScope;
     ctx.$injector = $injector;
+    $httpBackend.when('GET', /\.html$/).respond('');
   }));
 
   function createDatasource(instanceSettings) {

public/app/plugins/datasource/graphite/specs/datasource_specs.ts

@@ -15,6 +15,7 @@ describe('graphiteDatasource', function() {
     ctx.$httpBackend =  $httpBackend;
     ctx.$rootScope = $rootScope;
     ctx.$injector = $injector;
+    $httpBackend.when('GET', /\.html$/).respond('');
   }));
 
   beforeEach(function() {

public/app/plugins/datasource/opentsdb/specs/datasource-specs.ts

@@ -12,9 +12,10 @@ describe('opentsdb', function() {
 
   beforeEach(angularMocks.inject(function($q, $rootScope, $httpBackend, $injector) {
     ctx.$q = $q;
-    ctx.$httpBackend =  $httpBackend;
+    ctx.$httpBackend = $httpBackend;
     ctx.$rootScope = $rootScope;
     ctx.ds = $injector.instantiate(OpenTsDatasource, {instanceSettings: instanceSettings});
+    $httpBackend.when('GET', /\.html$/).respond('');
   }));
 
   describe('When performing metricFindQuery', function() {

public/app/plugins/datasource/prometheus/specs/datasource_specs.ts

@@ -14,6 +14,7 @@ describe('PrometheusDatasource', function() {
     ctx.$httpBackend =  $httpBackend;
     ctx.$rootScope = $rootScope;
     ctx.ds = $injector.instantiate(PrometheusDatasource, {instanceSettings: instanceSettings});
+    $httpBackend.when('GET', /\.html$/).respond('');
   }));
 
   describe('When querying prometheus with one target using query editor target spec', function() {

public/app/plugins/datasource/prometheus/specs/metric_find_query_specs.ts

@@ -8,6 +8,7 @@ describe('PrometheusMetricFindQuery', function() {
 
   var ctx = new helpers.ServiceTestContext();
   var instanceSettings = {url: 'proxied', directUrl: 'direct', user: 'test', password: 'mupp' };
+
   beforeEach(angularMocks.module('grafana.core'));
   beforeEach(angularMocks.module('grafana.services'));
   beforeEach(angularMocks.inject(function($q, $rootScope, $httpBackend, $injector) {
@@ -15,6 +16,7 @@ describe('PrometheusMetricFindQuery', function() {
     ctx.$httpBackend =  $httpBackend;
     ctx.$rootScope = $rootScope;
     ctx.ds = $injector.instantiate(PrometheusDatasource, {instanceSettings: instanceSettings});
+    $httpBackend.when('GET', /\.html$/).respond('');
   }));
 
   describe('When performing metricFindQuery', function() {

public/test/specs/value_select_dropdown_specs.js

@@ -11,7 +11,7 @@ function () {
     var rootScope;
 
     beforeEach(module('grafana.core'));
-    beforeEach(inject(function($controller, $rootScope, $q) {
+    beforeEach(inject(function($controller, $rootScope, $q, $httpBackend) {
       rootScope = $rootScope;
       scope = $rootScope.$new();
       ctrl = $controller('ValueSelectDropdownCtrl', {$scope: scope});
@@ -19,6 +19,7 @@ function () {
         return $q.when(tagValuesMap[obj.tagKey]);
       };
       ctrl.onUpdated = sinon.spy();
+      $httpBackend.when('GET', /\.html$/).respond('');
     }));
 
     describe("Given simple variable", function() {