TST: test_transactions for sqlite fallback fails on python 3.6
Skipped on travis for now: https://github.com/pandas-dev/pandas/commit/880de3054c7ce3a6c48e295837207787dc73350f

See also comment here: https://github.com/pandas-dev/pandas/issues/14679#issuecomment-261533205 (I can reproduce it locally by running the test, but not with a simple example mimicking the test)


