back down to 3.1.0 because giraph does not work with 3.1.1 just yet
back down to 3.1.0 because giraph does not work with 3.1.1 just yet

graben1437/titan1withtp3.1,graben1437/titan1withtp3.1,graben1437/titan1withtp3.1,graben1437/titan1withtp3.1