during ip allocation, there are failure modes where a node might hold a ip address

during ip allocation, there are failure modes where a node might hold a ip address
but thinks it is still unassigned (-1).

add code to the recovery daemon to detect this case and trigger a reallocation
so that the ip gets covered

and change the takeip code to allow for this condition, taking on an ip address that is
already hosted.

cq s1021073
(cherry picked from commit 9020baf27cab7821c9094cda185206fb7af0fee7)