test: blacklist TEST-41 on Ubuntu CI

This test has been failing on Ubuntu CI since introduced, let's
blacklist it until we can debug what's causing it to fail.

diff --git a/test/TEST-41-ONESHOT-RESTART/blacklist-ubuntu-ci b/test/TEST-41-ONESHOT-RESTART/blacklist-ubuntu-ci
new file mode 100644 (file)
index 0000000..22b34bb
--- /dev/null
+++ b/test/TEST-41-ONESHOT-RESTART/blacklist-ubuntu-ci
@@ -0,0 +1,4 @@
+This appears to be failing on Ubuntu CI due to short sleep duration
+waiting for the service-restarts to complete, but doubling the
+sleep from 5 to 10 seconds didn't appear to help, so let's blacklist
+this on Ubuntu CI while debugging the test failure.