[barbican] Retry on tls connection timeout

The GET request could get lost or stuck on the way to
loadbalancer->backend, so let's retry it.

Closes-Bug: PRODX-16055
Change-Id: Iab75cc251daba755dd248cda6b7b8c534283fc5d
(cherry picked from commit 01954d37942b7220243e914cecded8ac16d1a1c0)
1 file changed