Change mongo version string ("3.2" -> "3.2.0")
Change mongo version string ("3.2" -> "3.2.0")

It seems the repository has changed its version string such that
'apt-get install mongodb-org=3.2' no longer works,  but 'apt-get install
mongodb-org=3.2.0' does.

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