Fixing bug in areOperationsMirrored and adding tests for it

package.json

@@ -67,7 +67,7 @@
         "c9.ide.language.javascript.infer": "#325ac6880e",
         "c9.ide.language.jsonalyzer": "#4b329741b1",
         "c9.ide.language.codeintel": "#046d39603b",
-        "c9.ide.collab": "#c9048d629a",
+        "c9.ide.collab": "#23fab49d71",
         "c9.ide.local": "#10eb45842a",
         "c9.ide.find": "#e33fbaed2f",
         "c9.ide.find.infiles": "#c0a13737ef",