sepolgen: Apply fixes discovered by 2to3 where needed.

Replace usage of print statement with print function.
Use `in` instead of `has_key` when checking for key in dict.
When using `raise` add text (if any) as parameter of exception function.
Add Python3 imports of moved modules.
Replace `map` with list comprehension.
Use reserved word `as` in try-except when catching exception.
Replace `ifilter` function with `filter`.

Signed-off-by: Robert Kuska <rkuska@redhat.com>
12 files changed