Adopt to gabbi 4.0.0

gabbi 4.0.0 replaced the urllib library by the httpx library, which
encodes response body by utf-8 by default. Update the assertion of
response bodies which contain unicode characters.

FIPs job is made non-voting because we need [1] to fix it.

[1] https://review.opendev.org/c/openstack/ceilometer/+/978865

Change-Id: I0a5b89020c3a7b91dae5eef3c52c6ac7856883ab
Signed-off-by: Takashi Kajinami <kajinamit@oss.nttdata.com>
3 files changed