Fix tabManager tests

plugins/c9.ide.editors/tabmanager_test.js

@@ -247,6 +247,7 @@ require(["lib/architect/architect", "lib/chai/chai"],
 
                 it('should rename a directory  - change tab path', function(done) {
                     var vpath = "/dir/stuff.json";
+                    fs.rmdir("/dir2", { recursive: true }, function(){
                         tabs.openFile(vpath, function(err, tab) {
                             expect(tab.path).to.equal(vpath);
                             expect(tab.title).to.equal("stuff.json");
@@ -266,6 +267,7 @@ require(["lib/architect/architect", "lib/chai/chai"],
                         });
                     });
                 });
+            });
 
             describe("getTabs(), getPanes()", function(){
                 it('should return a list containing all the pages', function(done) {