HPCC-11156 Allow hpcc-run.sh run concurrently

1) Generate script hpcc-run_<pid> which take only 1 input parameter: ip
2) If python 2.6+ installed it will run above script through cluster_script.py.
    It allows mulitple instances run simultanously. The default is 5.
    If no python 2.6+ found it will run the script sequentially
3) It follows original script logics:
    start: first start hpcc on the host which run dali, then start hpcc on rest hosts
    stop: first stop hpcc on all the hosts which do not have dali, then the host has dali.
4) For hpcc-init status, each host status is saved in a file with name as ip under:
       /var/log/HPCCSystems/cluster/status/yyyymmdd_HHMMSS/
5) Log file is at /var/log/HPCCSystesm/cluster/XX_hpcc-run_<pid>_yyyymmdd_HHMMSS.log
    For concurrent exection XX is "cc" If run sequentially it is "se".