Use python 2.6 on EL6 also (BZ#1346950)
Amazon Linux /usr/bin/python -> /usr/bin/python2.7, while the EL6
builds we do expect /usr/bin/python -> /usr/bin/python2.6. This
causes python programs to fail after install on Amazon Linux.
Change ansible build and install process to force resulting
application to use /usr/bin/python2.6 explicitly.