Increasing test timeout of metadata_test

plugins/c9.ide.editors/metadata_test.js

@@ -108,6 +108,8 @@ require(["lib/architect/architect", "lib/chai/chai", "/vfs-root"],
         });
         
         describe('metadata', function() {
+            this.timeout(20000);
+            
             before(function(done) {
                 apf.config.setProperty("allow-select", false);
                 apf.config.setProperty("allow-blur", false);