Our newer ansible version needs a newer Boto for BlockDeviceType features

https://github.com/boto/boto/commit/2e771c17678e33ecabaff6b78c7bf53e41a95ce7

requirements.txt

@@ -2,7 +2,7 @@ git+https://github.com/edx/ansible.git@stable-1.9.3-rc1-edx#egg=ansible==1.9.3-e
 PyYAML==3.11
 Jinja2==2.8
 MarkupSafe==0.23
-boto==2.32.1
+boto==2.33.0
 ecdsa==0.11
 paramiko==1.15.1
 pycrypto==2.6.1