Merge pull request +7703 from c9/fix/ruby-2.2

Upgrade default Ruby 2.2 + Rails stable

package.json

@@ -103,7 +103,7 @@
         "c9.ide.recentfiles": "#7c099abf40",
         "c9.ide.remote": "#301d2ab519",
         "c9.ide.processlist": "#bc11818bb5",
-        "c9.ide.run": "#9d632b19c0",
+        "c9.ide.run": "#469ffef3f1",
         "c9.ide.run.build": "#ad45874c88",
         "c9.ide.run.debug.xdebug": "#3b1520f83d",
         "c9.ide.save": "#a03709ef3f",