Fix Podman logs reading journald

A podman could not read logs written to journald properly, due to a tail config bug.
Added a system test to check this - since e2e tests don't like journald

Signed-off-by: Ashley Cui <acui@redhat.com>

test/system/035-logs.bats

@@ -50,4 +50,15 @@ ${cid[1]} c
 ${cid[0]} d"   "Sequential output from logs"
 }
 
+@test "podman logs over journald" {
+    msg=$(random_string 20)
+
+    run_podman run --name myctr --log-driver journald $IMAGE echo $msg
+
+    run_podman logs myctr
+    is "$output" "$msg" "check that log output equals the container output"
+
+    run_podman rm myctr
+}
+
 # vim: filetype=sh