base: wsgi middlewares reorganization

• Fixing DebbugedApplication middleware usage.

• Using an Apache environment variable to detect when to apply the WSGIScriptAliasFix: WSGI_SCRIPT_ALIAS pointing to the script name.

• NOTE regenerate your apache configuration by running: inveniomanage apache create-config

Signed-off-by: Yoan Blanc <yoan.blanc@cern.ch>
Reviewed-by: Jiří Kunčar <jiri.kuncar@cern.ch>