S1031575

S1031575

When performing addip   we dont allow "gratious failvoer"  which can, due to timing, and depending on which order the "ctdb addip ..." is called on the nodes lead to imperfect balancing of the ip addresses when addigng several at the same time.

This patch makes sure that once the ip address is added to a node, any node,  this ip address is released from the node currently hosting the address and there will possibly be a failover after a short while while performing the rebalance of the ip address.

This means that when performing "ctdb addip ..." and adding it to a new node, this could affect/disrupt the i/o on this address to the node currently hosting the address,  but
it will mean we do get a more even distribution after the assignment.

This is based on the assumption that it will be more common to "add completely new ip to a set of nodes"  rather than "add an ip address that is already in service to a brand new node"