Description of problem:
Having local ssh configuration for ProxyCommand that contains "nc" like:

# cat /usr/share/foreman-proxy/.ssh/config
Host proxyserver
ProxyCommand

Host *
ProxyCommand ssh -q -i /usr/share/foreman-proxy/.ssh/id_rsa_foreman_proxy proxyrex@proxyserver nc %h %p
#

then invoking and REX job leaves one ssh zombie proces.

smart_proxy_dynflow_core service must be restarted to clean the ssh defunct processes


Version-Release number of selected component (if applicable):
Sat 6.2.9


How reproducible:
100%


Steps to Reproduce:
1. Have above-like ssh config
2. Run a REX job - it can fail or succeed, it doesnt matter. Even it can fail due to wrongly set .ssh/config, that does not matter either.
3. Check ssh processes on the Satellite/Capsule that invoked the ssh commands


Actual results:
# ps aux | grep defunct
foreman+ 24776  0.0  0.0      0     0 ?        Z    13:06   0:00 [ssh] <defunct>
foreman+ 24848  0.0  0.0      0     0 ?        Z    13:07   0:00 [ssh] <defunct>
root     24856  0.0  0.0 112652   964 pts/0    S+   13:07   0:00 grep --color=auto defunct
# 

(each REX job adds one such defunct process)


Expected results:
# ps aux | grep defunct
root     24856  0.0  0.0 112652   964 pts/0    S+   13:07   0:00 grep --color=auto defunct
#


Additional info: