Updated openstack/openstack
Project: openstack-dev/pbr  2aeb8da1dcab1d916928ce4b4b726a1aa4e252b8
null
Fixes blocking issue on Windows

On Windows, environment variables can not be unicode.

Change-Id: I8c7fd7627d7f733e0db8690a39e7128b7fe2ebcf
Closes-bug: #1294246