Package installation in ping and other scripts doesn't work

[jmcvaughn]

Opening ssh sessions to all servers
Traceback (most recent call last):
  File "./wekachecker.py", line 202, in <module>
    p = subprocess.Popen(["ping", "-c1", server._hostname], stdout=ot, stderr=ot)
  File "/usr/lib64/python3.6/subprocess.py", line 729, in __init__
    restore_signals, start_new_session)
  File "/usr/lib64/python3.6/subprocess.py", line 1364, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'ping': 'ping'

If you run the scripts standalone, they work as expected.

I'm tempted to remove these but I see that they were included in commits to resolve issues/improve functionality. ping and other iputils stuff should be pre-installed on all systems (and removing iputils-ping even removes dracut as a dependency somehow!) so whether these installation checks are even needed is another matter...