Revert "awsutils: force boto to use latest cacerts file"

This reverts commit 6f26ab5d841f8fb01cd46ba5462be8b1246e3a8c.

Conflicts:
	starcluster/awsutils.py

No longer needed now that boto 2.10.0 is out. Bumped boto dep to 2.10.0
in setup.py
setup: bump paramiko to latest 1.11.0 version