gdal failures

https://travis-ci.org/OSGeo/gdal/builds/179899983

  TEST: lcp_17 ... expected_fail
  TEST: netcdf_56 ... fail (blowup)
  TEST: netcdf_57 ... fail (blowup)
  TEST: ogr_feature_default ... fail (blowup)
  TEST: ogr_feature_nullable_validate ... fail (blowup)
  TEST: ogr_interlis2_4 ... Warning 6: Failed to add new definition to existing layers, attributes not saved: Language, Text,
  TEST: ogr_rfc41_1 ... fail (blowup)
  TEST: ogr_rfc41_2 ... fail (blowup)
  TEST: ogr_rfc41_3 ... fail (blowup)
  TEST: ogr_rfc41_4 ... fail (blowup)
  TEST: ogr_rfc41_6 ... fail (blowup)
  TEST: ogr_vrt_29 ... ERROR 1: Failed to open datasource `/vsimem/ogr_vrt_29.shp'.
  TEST: osr_esri_21 ... ERROR: Failed 111 EPSG tests, see file tmp/esri_gcs2_epsg.txt
  TEST: osr_esri_22 ... ERROR: Failed 21 SRS tests, see file tmp/epsg_gcs_srs.txt
  TEST: osr_esri_23 ... ERROR: Failed 65 EPSG tests, see file tmp/epsg_gcs2_epsg.txt
  TEST: pam_11 ... ERROR 4: Attempt to create new tiff file `tmpdirreadonly/byte.tif.ovr' failed in VSI_TIFFOpen().
  TEST: test_gdaltindex_5 ... fail (blowup)
  TEST: test_gdaltindex_6 ... fail (blowup)
  TEST: test_gdaltindex_cleanup ... fail (blowup)