Use https instead of http in web links. (#4276)

Signed-off-by: Masaki Muranaka <monaka@monami-ya.com>

README.md

@@ -1,5 +1,5 @@
 ## About Eclipse Che
-Eclipse Che is a next generation Eclipse IDE and open source alternative to IntelliJ. This repository is licensed under the Eclipse Public License 1.0. Visit [Eclipse Che's Web site](http://eclipse.org/che) for feature information or the main [Che assembly repository](http://github.com/codenvy/che) for a description of all participating repositories.
+Eclipse Che is a next generation Eclipse IDE and open source alternative to IntelliJ. This repository is licensed under the Eclipse Public License 1.0. Visit [Eclipse Che's Web site](https://eclipse.org/che) for feature information or the main [Che assembly repository](https://github.com/codenvy/che) for a description of all participating repositories.
 
 Che Dashboard
 ==============

src/app/admin/plugins/plugins.controller.ts

@@ -162,7 +162,7 @@ export class AdminPluginsCtrl {
 
   dropzoneAcceptURL(url) {
 
-    if (!url.startsWith('upload:') && !url.startsWith('http://eclipse.org/che/?install')) {
+    if (!url.startsWith('upload:') && !url.startsWith('https://eclipse.org/che/?install')) {
       let deferred = this.$q.defer();
       deferred.reject({data: {message:'The plugin URL is invalid'}});
       return deferred.promise;

src/components/api/che-git.spec.ts

@@ -63,7 +63,7 @@ describe('CheGit', function () {
       var agentUrl = 'localhost:3232/wsagent/ext';
       var workspaceId = 'workspace123test';
       var projectPath = '/testProject';
-      var localUrl = 'http://eclipse.org/che/git/f1/' + workspaceId + projectPath;
+      var localUrl = 'https://eclipse.org/che/git/f1/' + workspaceId + projectPath;
       var runtime =  {'links': [{'href': agentUrl, 'rel': 'wsagent'}]};
       var workspace1 = apiBuilder.getWorkspaceBuilder().withId(workspaceId).withRuntime(runtime).build();