Merge pull request #247 from timvaillancourt/pymongo3.6.0

Update to Pymongo 3.6.0 and latest GCE

Author: dbmurphy

requirements.txt

@@ -1,10 +1,10 @@
 multiprocessing
 Fabric==1.14.0
-pymongo==3.5.1
+pymongo==3.6.0
 pynsca==1.5
 PyYAML==3.12
 boto==2.48.0
 filechunkio==1.8
 python-dateutil==2.6.1
 yconf==0.3.4
-google_compute_engine==2.6.0
+google_compute_engine==2.7.2