add action file that is created via test_dump_loads test

The test_dumps_load tests creates the following file:
    congress/policy/tests/snapshot/action
in the source tree. This commit adds this file to the source tree
so it's no longer hanging around after the tests run.

Change-Id: Id92481eb3e30216d7219b9aaa20e5f575f170d8b
Closes-bug: #1379627
Merge "add action file that is created via test_dump_loads test"