refactor: flags, cleans up properly, emr capability

• 2.0.0 -- 2023-04-28
  • code 2.0.0
    • use sessions
    • make assume role call to remote account where PHZ is defined
    • add dns entries to the DDB item, so that on stop/terminate we delete only what was added
    • add flags: noforward, noptr, noheritage, nocname
    • add data: boc:dns:ptrname
    • add detection of a runnign EMR cluster with aws:elasticmapreduce: job-flow-id (cluster) and instance-group-role and use this to
      set an alias defined in boc:dns:cname ({friendlyname}.master), but if it is a cluser node, only use the cname if it is master. If
      it is not a cluster, set the cname