Merge pull request #1177 from DataDog/brettlangdon/pyyaml.botocore

tests: Fix botocore py34 tests

Author: brettlangdon

tox.ini

@@ -187,6 +187,7 @@ deps =
     boto: boto
     boto: moto<1.0
     botocore: botocore
+    py34-botocore: PyYAML<5.3
     botocore: moto>=1.0,<2
     bottle11: bottle>=0.11,<0.12
     bottle12: bottle>=0.12,<0.13