Run mocha/instanbul in login shell

package.json

@@ -109,7 +109,7 @@
         "c9.ide.scm": "#d92bb9aeb5",
         "c9.ide.terminal.monitor": "#b76f1c9f24",
         "c9.ide.test": "#302388c9eb",
-        "c9.ide.test.mocha": "#c81861817e",
+        "c9.ide.test.mocha": "#55d85ae95e",
         "c9.ide.theme.flat": "#2de8414db7",
         "c9.ide.threewaymerge": "#229382aa0b",
         "c9.ide.undo": "#b028bcb4d5",