pymongo version bump

[lillypad]

I tested cuckoo with pymongo version bumped and it works as no errors returned in the reporting phase.

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What I have added/changed is:

• pymongo version in setup.py

The goal of my change is:

• Update old dependencies

What I have tested about my change is:

• Tested with latest version of mongodb

[coveralls]

Coverage remained the same at 61.949% when pulling 1db49c6 on lillypad:patch-2 into c41c7c5 on cuckoosandbox:master.

[codecov-io]

Codecov Report

Merging #2360 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master   #2360   +/-   ##
======================================
  Coverage      62%     62%           
======================================
  Files         152     152           
  Lines       15177   15177           
======================================
  Hits         9410    9410           
  Misses       5767    5767

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