BUG-8422: separate retry and request timeouts

This patch corrects a thinko around request timeouts, where we
reconnect the connection based on request timeout, not based on
the 'try' timeout.

The difference between the two is that the 'try' timeout is the
period we allow the backend to respond to our request and when
it does not, we reconnect the connection.

Change-Id: I8c00a80e5c26c5b829056c43fe78a0567041bc5e
Signed-off-by: Robert Varga <robert.varga@pantheon.tech>
Signed-off-by: Tomas Cere <tcere@cisco.com>