kombu accept TTL as seconds instead of millisecond since version 3.0.25,
We remove TTL conversion in commit d49ddc3b9828f097d5bb39bca0381386a9de7762,
which is valid only when kombu >=3.0.25, so need do conversion according
to kombu version.
Note: Remove this workaround when all supported branches with
requirement kombu >=3.0.25
Closes-Bug: #1531148
Change-Id: I762265f23084a95f2d24cb434bad7d9556d4edd5