Admin API to do complete redistribute of favored nodes

The complete redistribute command/API creates new favored nodes for existing tables. This command is very invasive and disturbs both region assignment and data locality. All the regions get new set of favored nodes and are moved to the primary favored node. The favored nodes are generated in round robin fashion to ensure they are distributed evenly throughout the cluster. This command should only be used as a last resort when favored nodes should be regenerated and loss of locality is acceptable.