update python version in travis
update python version in travis

ResearchComputing/OIDE,ResearchComputing/OIDE,SandstoneHPC/sandstone-ide,SandstoneHPC/OIDE,SandstoneHPC/OIDE,ResearchComputing/OIDE,ResearchComputing/OIDE,SandstoneHPC/sandstone-ide,SandstoneHPC/OIDE,SandstoneHPC/sandstone-ide