Don't use __opts__.get() for hash_type
Don't use __opts__.get() for hash_type

First of all, the opts will never not have this key, as it has a default
value in salt/config/__init__.py. Second, the default hash type changed
to sha256 anyway in 2016.11, so we shouldn't be referring to a specific
hash type when it'll no longer be accurate after a merge-forward.

saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt