Rebalance failure due to reason replicator_died with memcached_error,auth_error,<<"Auth failure">>, also during online upgrade from 172 to 181

Seeing this failure, pretty much very where in regression. This is blocking running automation.

Rebalance exited with reason {{change_filter_failed,
{'EXIT',
{{badmatch,failed},
[

{ns_vbm_sup, '-local_change_vbucket_filter/4-fun-2-',6}

,

{misc,'-executing_on_new_process/1-fun-0-', 3}

]}}},
[

{ns_vbm_sup,change_vbucket_filter,4}

,

{ns_vbm_sup,'-set_replicas/3-fun-2-',5}

,

{lists,foldl,3}

,

{ns_vbm_sup,set_replicas,3}

,

{ns_vbm_sup,'-set_replicas/2-fun-1-',3}

,

{lists,foreach,2}

,

{ns_vbm_sup,apply_changes,2}

,

{ns_vbucket_mover,sync_replicas,0}

]}