TST: test for breaking test in pytables on travis
CLN/BUG: Revert 2/3 compat changes to vb_suite
Merge pull request #4478 from jtratner/revert-vb-suite

BUG: revert 2/3 changes in vbsuite
Merge pull request #4489 from jreback/hdf_fix

TST: test for breaking test in pytables on travis
TST: reverse hdf_fix
Merge pull request #4490 from jreback/hdf_fix2

TST: reverse hdf_fix