Bug 14285: Bengali locale needs to be re-defined

Bug 14285: Bengali locale needs to be re-defined

This patch renames translation files for Bengali
language, from ben-* to bn-IN-*.
Also adds India as region

To test:
1) Apply the patch
2) Run updatedatabase
3) Install Bengali language
cd misc/translator
perl translate install bn-IN
enable

Check correct description

4) Create and install a fake Bengali variant
cd misc/translator
perl translate create bn-XX
perl translate install bn-XX
enable both variants

Check correct rendering of region

Results comply with expected test plan outcome. Signed off for bn-IN
Signed-off-by: Indranil Das Gupta (L2C2 Technologies) <indradg@gmail.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>