Merge pull request #482 from metabase/small_unit_test_refactor

src/metabase/util.clj

test/metabase/api/card_test.clj

test/metabase/api/dash_test.clj

test/metabase/api/meta/dataset_test.clj

test/metabase/api/meta/db_test.clj

test/metabase/api/meta/field_test.clj

test/metabase/api/meta/table_test.clj

test/metabase/db/metadata_queries_test.clj

test/metabase/driver/generic_sql/connection_test.clj

test/metabase/driver/generic_sql/native_test.clj

test/metabase/driver/generic_sql/query_processor_test.clj

test/metabase/driver/generic_sql_test.clj

test/metabase/driver/mongo/test_data.clj

test/metabase/driver/query_processor_test.clj

test/metabase/driver/sync_test.clj

test/metabase/models/field_test.clj

test/metabase/test/data.clj

test/metabase/test/data/datasets.clj