test-logging: unset G_MESSAGES_DEBUG
test-logging: unset G_MESSAGES_DEBUG

This test is sensitive to G_MESSAGES_DEBUG variable. Make it insensitive
by unsetting the environment variable.

Signed-off-by: Marc-André Lureau <a6f2b960a4aca61381fc650a67901b2ac8e83e6d@redhat.com>
Acked-by: Frediano Ziglio <55d48b080b2e443e395cde84d2c83b135a4ff48e@redhat.com>

fgouget/spice-common,SPICE/spice-common,fgouget/spice-common,SPICE/spice-common,fgouget/spice-common,SPICE/spice-common,fgouget/spice-common