Cleaning up a couple nits in the Symantec plugin

Change-Id: I1afa289db566103de90e57cbb9dd6a370be8f021
Excluding alembic migrations from coverage

Currently we cannot tests the migrations within our unit test setup. We
should look into alternative ways of testing migrations and their
coverage.

Change-Id: I5fbc4957a7ed1e0924bce562530adbe5fd2d966b
Merge "Cleaning up a couple nits in the Symantec plugin"
Merge "Excluding alembic migrations from coverage"