Handle URL redirects for SPDX listed licenses

[Gary O'Neall]

If the URL for the SPDX listed licenses were to move and a URL redirect is returned, the SPDX tools will fail to redirect and use the local cache of licenses rather than follow the redirect.

The code that needs updated is located at

tools/src/org/spdx/rdfparser/license/ListedLicenses.java

Line 280 in ff853b0

 in = FileManager.get().open(actualUrl); 

[Jay Rajput]

Hey! Is this issue up for grabs?

[Gary O'Neall]

@jay24rajput Yes - please feel free to take this :)