Description of problem:

When running bootstrap.py to register a Content Host to a Satellite that does not have puppet enabled it fails


Version-Release number of selected component (if applicable):
6.11 snap 15

 ~]# rpm -q satellite
satellite-6.11.0-0.8.beta.el7sat.noarch
 ~]#  rpm -q katello-client-bootstrap
katello-client-bootstrap-1.7.8-1.el7sat.noarch
 ~]# 

How reproducible:
every time

Steps to Reproduce:
1. Install Sat6.11 but do not enable puppet
~]# satellite-installer --help | grep -i enable-puppet
    --[no-]enable-puppet          Enable 'puppet' puppet module (default: false)

2. Sync RHEL7 repo, create AK for RHEL7, create HG with necessary settings
3. run boot strap on Content Host

Actual results:

[SUCCESS], [2022-04-13 14:27:07], [/usr/bin/yum -y remove puppet-agent], completed successfully.
[NOTIFICATION], [2022-04-13 14:27:07], [/var/lib/puppet/ does not exist - not removing]
[NOTIFICATION], [2022-04-13 14:27:07], [/opt/puppetlabs/puppet/cache does not exist - not removing]
[NOTIFICATION], [2022-04-13 14:27:07], [/etc/puppetlabs/puppet/ssl does not exist - not removing]
Traceback (most recent call last):
  File "bootstrap.py", line 1573, in <module>
    install_puppet_agent()
  File "bootstrap.py", line 548, in install_puppet_agent
    puppet_env = return_puppetenv_for_hg(return_matching_foreman_key('hostgroups', 'title="%s"' % options.hostgroup, 'id', False))
  File "bootstrap.py", line 860, in return_puppetenv_for_hg
    if hostgroup['environment_name']:
KeyError: 'environment_name'

Expected results:
registration succeeds 


Additional info:
Found while testing Bug 2064707 - bootstrap.py can't reach the API via the capsule