userportal,webadmin: fix LocaleFilter

- Fixed a potential resource leak in LocaleFilter. The inputstream was
opened but never closed.
- Conformed the location of languages.properties to the same layout
as other properties files.

Change-Id: I57d895d44c463c835d396bf2c83e2a580d079688
Signed-off-by: Alexander Wels <awels@redhat.com>