Description of problem:
When trying to upgrade (from 6.7.1) to 6.8, I get:

```
Update package(s) :                                                   [OK]
--------------------------------------------------------------------------------
Procedures::Installer::Upgrade:                                       [FAIL]
Failed executing LANG=en_US.utf-8 satellite-installer, exit status 6:
 Executing: foreman-maintain packages -h
Executing: foreman-maintain packages is-locked --assumeyes
Executing: foreman-maintain service start --only=postgresql
could not change directory to "/root"
Executing: foreman-maintain service stop
 * upgrading from 'postgresql.service' to 'rh-postgresql12-postgresql.service'
 * Upgrading database.
 * Upgraded OK.
WARNING: The configuration files were replaced by default configuration.
WARNING: The previous configuration and data are stored in folder
WARNING: /var/lib/pgsql/data.
WARNING: If you've just upgraded your database from a previous major version of
Fedora or RHEL, please run reindexdb against your databases.  Core library
collation data may have changed and this will invalidate database indexes.  For
example, in Fedora 28 and RHEL 8 there have been extensive changes in glibc
collations to support ISO 14651:2016 (Unicode 9.0.0 data) and your indexes may
be affected: https://sourceware.org/ml/libc-announce/2018/msg00002.html
 * See /var/lib/pgsql/upgrade_rh-postgresql12-postgresql.log for details.
scl enable rh-postgresql12 "PGSETUP_INITDB_OPTIONS='--lc-collate=en_US.UTF-8 --lc-ctype=en_US.UTF-8 --locale=en_US.UTF-8' postgresql-setup --upgrade" finished successfully!
rm -f /etc/systemd/system/postgresql.service finished successfully!
Info: Loading facts                               : 0 00:00:00
   no_proxy = []                                  : 0 0.0/s 00:00:01
Debug: Automatically imported foreman::plugin::azu: 0 0.0/s 00:00:02
[...]
Debug: /Stage[main]/Foreman_proxy::Plugin::Pulp/Fo: 0 0.0/s 00:08:20
Notice: /Stage[main]/Foreman_proxy::Service/Servic: 0 0.0/s 00:08:27
Info: /Schedule[puppet]: Starting to evaluate the : 0 0.0/s 00:08:30
 Could not find a suitable provider for foreman_smartproxy
Done                                              : 1 0.0/s 00:08:38
Done                                              : 1 0.0/s 00:08:38
  Something went wrong! Check the log for ERROR-level output
  The full log is at /var/log/foreman-installer/satellite.log
```

Full output and log attached.

Version-Release number of selected component (if applicable):
Sat 6.8 snap 7.0

How reproducible:


Steps to Reproduce:
0. Have repos already set up (since testing from snap)
1. # satellite-maintain upgrade run --target-version 6.8 --whitelist="repositories-validate,repositories-setup" -y

Actual results:
Shown above

Expected results:
Successfully upgraded Satellite

Additional info:
# echo $LANG
en_US.UTF-8
# yum repolist
[...]
repo id                                                                                                           repo name                                                                                                         status
!Sat6-CI_Red_Hat_Satellite_6_8_Composes_Satellite_6_8_RHEL7                                                       Satellite 6.8 RHEL7                                                                                                    0+444
Sat6-CI_Red_Hat_Satellite_6_8_Composes_Satellite_Maintenance_Next_RHEL7                                           Satellite 6 Maintenance Next                                                                                            2+13
!Sat6-CI_Red_Hat_Satellite_6_8_Composes_Satellite_Tools_6_8_RHEL7/x86_64                                          Tools 6.8 RHEL7                                                                                                         0+64
ansible-runner/x86_64                                                                                             Ansible runner                                                                                                          0+63
rhel-7-server-ansible-2.8-rpms/x86_64                                                                             Red Hat Ansible Engine 2.8 RPMs for Red Hat Enterprise Linux 7 Server                                                   0+16
rhel-7-server-rpms/7Server/x86_64                                                                                 Red Hat Enterprise Linux 7 Server (RPMs)                                                                          166+29,053
rhel-server-rhscl-7-rpms/7Server/x86_64                                                                           Red Hat Software Collections RPMs for Red Hat Enterprise Linux 7 Server                                             0+12,727
repolist: 168