Description of problem:
Remote Execution fails when RHEL 8.2 clients are configured with the DEFAULT:NO-SHA1 systemwide crypto policy

Version-Release number of selected component (if applicable):
satellite-6.8.0-1.el7sat.noarch
crypto-policies-20191128-2.git23e1bf1.el8.noarch

How reproducible:
Every time

Steps to Reproduce:
1. Configure the NO-SHA1 crypto policy on a RHEL 8.2 client:
update-crypto-policies --set DEFAULT:NO-SHA1

2. From Satellite, copy foreman-proxy SSH keys to the client:
ssh-copy-id -i ~foreman-proxy/.ssh/id_rsa_foreman_proxy.pub user.xx.xx

3. Verify SSH works:
ssh -i ~foreman-proxy/.ssh/id_rsa_foreman_proxy user.xx.xx

4. Schedule a remote execution job from Satellite:
All hosts -> select host -> Schedule remote job
Job Category: Commands
Job template: Run Command - SSH Default
Command: hostname

Actual results:
Remote job fails

Expected results:
Remote job succeeds

Additional info:
Satellite reports the following in /var/log/foreman/production.log:

Parameters: {"callback"=>{"task_id"=>"f11391f0-e310-49bc-8ffa-7497e0b1cd38", "step_id"=>3}, "data"=>{"result"=>[{"output_type"=>"
debug", "output"=>"Error initializing command: Net::SSH::AuthenticationFailed - Authentication failed for user user.xx.xx", "timestamp"=>1604018256.3824
368}], "runner_id"=>"a82ae4db-f852-4790-8fa0-fed85c65e610", "exit_status"=>"EXCEPTION"}, "task"=>{}}

The client reports the following in /var/log/secure:
sshd[8898]: userauth_pubkey: key type ssh-rsa not in PubkeyAcceptedKeyTypes [preauth]

Disabling the NO-SHA1 policy enables remote execution to proceed:
update-crypto-policies --set DEFAULT
systemctl restart sshd