Bump requests to 1.2.3

Ubuntu 13.10 ships requests 1.2.3, so make sure
we are installing a newer version.

Change-Id: I1c703334464ca8fb886a0bd4ee6580afbaf9dd75
Signed-off-by: Chuck Short <chuck.short@canonical.com>
Merge "Bump requests to 1.2.3"