Pin the Chrome version for testing.
Pin the Chrome version for testing.

Chrome 68 breaks headless gl tests and drastically slows down headed
tests using osmesa or swiftshader.  Rather than work around this by
making headless gl tests headed and adding more delay to tests, pin to
version 67 for now.

Kitware/geojs,OpenGeoscience/geojs,OpenGeoscience/geojs,Kitware/geojs,OpenGeoscience/geojs,Kitware/geojs