Use circleci's ram version of mongo 3.4.
Use circleci's ram version of mongo 3.4.

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