Upgrade tomviz Dockerfile to ITK 5.0
Upgrade tomviz Dockerfile to ITK 5.0

The Dockerfile uses Ubuntu 16.04, which does not have cmake
3.10.2. We may need to install it manually, or upgrade to
Ubuntu 18.04, which does use cmake 3.10.2.

Signed-off-by: Patrick Avery <743342299f279e7a8c3ff5eb40671fce3e95f13a@kitware.com>

OpenChemistry/tomviz,OpenChemistry/tomviz,OpenChemistry/tomviz,OpenChemistry/tomviz