Specify bare excepts

[jisantuc]

Problem Description

Bare excepts are not PEP8 and make reconstructing intent difficult. There are a lot of them. There should be nearly none.

Replication Steps

From the repository root:

$ ag -lG .py "except:"
django/publicmapping/redistricting/templatetags/redistricting_extras.py
django/publicmapping/redistricting/tasks.py
django/publicmapping/redistricting/views.py
django/publicmapping/redistricting/models.py
django/publicmapping/redistricting/management/commands/setup.py
django/publicmapping/redistricting/calculators.py
django/publicmapping/redistricting/config.py
django/publicmapping/redistricting/tests.py
django/publicmapping/reporting/views.py
django/publicmapping/publicmapping/views.py

Expected Behavior or Output

I should be able to tell where any import is coming from by looking at the import list, or:

$ ag -lG .py "except:"
$