RegionMover should exclude draining/decommissioning nodes from target RSs

List<ServerName> regionServers = new ArrayList<>();
        regionServers.addAll(admin.getRegionServers());
        // Remove the host Region server from target Region Servers list
        ServerName server = stripServer(regionServers, hostname, port);
        .....
        // Remove RS present in the exclude file
        stripExcludes(regionServers);
        stripMaster(regionServers);