CFY-2644 use pymongo version 2.8.0
CFY-2644 use pymongo version 2.8.0

cloudify-cosmo/cloudify-nodecellar-example,EarthmanT/cloudify-nodecellar-example,ShayHassidim/cloudify-nodecellar-example,EarthmanT/cloudify-nodecellar-example,cloudify-cosmo/cloudify-nodecellar-example,ShayHassidim/cloudify-nodecellar-example