reverted python-boto version in pip-requires to 1.9b1.\
reverted python-boto version in pip-requires to 1.9b1.\
emonty/oslo-hacking,zancas/hacking,openstack-dev/hacking,emonty/oslo-hacking,zancas/hacking,hyakuhei/cleantox,hyakuhei/cleantox,openstack-dev/hacking