Check for and install easy_install
Check for and install easy_install

On Ubuntu 14.04 at least, easy_install is not present by default.
We need to check for it, and if its not there, add it so we can
install pip.  Added a comment block noting the bug and rationale
for using the package manager to get a baseline setuptools.

Change-Id: Icf5434e828ce6c15968d1f46c19a9e11b33f4ed6

EntropyWorks/bifrost,devananda/bifrost,bcornec/bifrost,devananda/bifrost,openstack/bifrost,EntropyWorks/bifrost,openstack/bifrost,bcornec/bifrost