'lb_algo rr' in keepalived won't work correctly with weight
for UDP and SCTP listeners, it should be 'lb_algo wrr'.
'wrr' is superset of 'rr' algorithm, as round-robin is
a specical instance of the weighted round-robin scheduling,
in which all the weights are equal. [1]
Algorithm in HAProxy is set to 'roundrobin', which also support
weights, but in keepalived must be set to 'wrr' to work with
the weighted round-robin scheduling, as it is different to 'rr'.
[1] https://www.keepalived.org/doc/scheduling_algorithms.html
Story 2008462
Task 41491
Change-Id: Ic63929d8864e5285baf70dd85e6362988bf2863f
(cherry picked from commit 5352a10f62)
d9603b3d21