Add curl to Ansible system dependencies
Add curl to Ansible system dependencies

This already existed for the RedHat version, but not Debian. This is
particularly noticeable when using this role to install on the default
Ubuntu Docker image which doesn't come preinstalled with curl.

manthey/girder,jbeezley/girder,kotfic/girder,data-exp-lab/girder,jbeezley/girder,RafaelPalomar/girder,RafaelPalomar/girder,manthey/girder,girder/girder,girder/girder,Xarthisius/girder,girder/girder,adsorensen/girder,jbeezley/girder,Xarthisius/girder,data-exp-lab/girder,kotfic/girder,Xarthisius/girder,RafaelPalomar/girder,adsorensen/girder,kotfic/girder,RafaelPalomar/girder,Kitware/girder,data-exp-lab/girder,adsorensen/girder,adsorensen/girder,jbeezley/girder,kotfic/girder,adsorensen/girder,data-exp-lab/girder,RafaelPalomar/girder,Kitware/girder,girder/girder,Kitware/girder,data-exp-lab/girder,Kitware/girder,Xarthisius/girder,Xarthisius/girder,manthey/girder,kotfic/girder,manthey/girder