pkg/services: fix ineffassign issues

pkg/services/sqlstore/migrations/migrations_test.go

@@ -27,7 +27,7 @@ func TestMigrations(t *testing.T) {
 
 			sqlutil.CleanDB(x)
 
-			has, err := x.SQL(sql).Get(&r)
+			_, err = x.SQL(sql).Get(&r)
 			So(err, ShouldNotBeNil)
 
 			mg := NewMigrator(x)
@@ -36,7 +36,7 @@ func TestMigrations(t *testing.T) {
 			err = mg.Start()
 			So(err, ShouldBeNil)
 
-			has, err = x.SQL(sql).Get(&r)
+			has, err := x.SQL(sql).Get(&r)
 			So(err, ShouldBeNil)
 			So(has, ShouldBeTrue)
 			expectedMigrations := mg.MigrationsCount() - 2 //we currently skip to migrations. We should rewrite skipped migrations to write in the log as well. until then we have to keep this