go vet yourself (#397)

go vet caught some nifty bugs. so fixed those here, and also made it so that
we vet everything from now on since the robots seem to do a better job of
vetting than we have managed to.

also adds gofmt check to circle. could move this to the test.sh script (didn't
want a script calling a script, because $reasons) and it's nice and isolated
in its own little land as it is. side note, changed the script so it runs in
100ms instead of 3s, i think find is a lot faster than go list.

attempted some minor cleanup of various scripts

api/datastore/internal/datastoretest/test.go

@@ -171,7 +171,7 @@ func Test(t *testing.T, dsf func() models.Datastore) {
 			t.Fatalf("Test GetCalls(ctx, filter): unexpected length `%v`", len(calls))
 		} else if calls[0].ID != c2.ID {
 			t.Log(buf.String())
-			t.Fatalf("Test GetCalls: call id not expected", calls[0].ID, c2.ID)
+			t.Fatalf("Test GetCalls: call id not expected %s vs %s", calls[0].ID, c2.ID)
 		}
 	})
 
@@ -387,7 +387,7 @@ func Test(t *testing.T, dsf func() models.Datastore) {
 		_, err := ds.InsertApp(ctx, testApp)
 		if err != nil && err != models.ErrAppsAlreadyExists {
 			t.Log(buf.String())
-			t.Fatalf("Test InsertRoute Prep: failed to insert app: ", err)
+			t.Fatal("Test InsertRoute Prep: failed to insert app: ", err)
 		}
 
 		// Testing insert route