Revert "Bump cirros version to 0.6.1"

This reverts commit 91efe177b170c3874989affc73842dc4ffbe062d.

Reason for revert: it broke tempest-slow job https://9afe3d390e4175b60a80-89b1085289883615a17bd93ef47f6ca9.ssl.cf5.rackcdn.com/871018/13/gate/tempest-slow-py3/d139ae1/testr_results.html

Change-Id: Ib74e51a780d3e8101f4147db9d24eebea4980fb1
2 files changed