Dusan Baljevic VK2COT Linux updates for RHEL/CentOS 7 and various contri...

...b scripts in Perl and Python:

Linux-audit-account-password-hashing.pl
Linux-Cluster-check.pl
Linux-check-IO-scheduler-and-discard-support.pl
Linux-check-ps.py

New tests are CHRONYC/CHRONYD replacement for standard XNTP (now default on RHEL/CentOS 7) and systemd-analyze (now standard on RHEL/CentOS 7 too).

Dusan Baljevic VK2COT