Make GuiceServletContextListener.INJECTOR_NAME a public field

_From [rkapsi](https://code.google.com/u/116755208212771764698/) on September 09, 2011 15:45:52_

Please change INJECTOR_NAME from package-private to a public field.

_Original issue: http://code.google.com/p/google-guice/issues/detail?id=651_

Locate GuiceServletContextListener and inspect the INJECTOR_NAME field. Done means the field is publicly accessible while preserving its existing name and value; the payload does not identify a test file to run.

Written by the indexing model from the issue text.