Description of problem: 

During the upgrade check from Satellite 6.16 to 6.17 fails at the PostgreSQL space check.

How reproducible:

100%

Is this issue a regression from an earlier version:

Steps to Reproduce:

1. Deploy fresh satellite 6.16
2.  ensure /var/lib/pgsql/data is used more than 50% of the disk space

3. Perform upgrade check for 6.17 

Actual behavior:

Check to make sure PostgreSQL 13 work directory has enough space for upgrade:
                                                                      [FAIL]
PostgreSQL will be upgraded from 12 to 13.
During the upgrade a backup is created in /var/lib/pgsql/data-old and requires at least 100383 MiB free space.

Scenario [Checks before upgrading] failed.

The following steps ended up in failing state:  

[available-space-for-postgresql13]

In case the failures are false positives, use
--whitelist="available-space-for-postgresql13"

1. # rpm -qa | grep satellite-6
   satellite-6.16.5.2-1.el9sat.noarch
2. # rpm -qa | grep postgresql
   postgresql-private-libs-13.22-1.el9_6.x86_64
   postgresql-13.22-1.el9_6.x86_64
   foreman-postgresql-3.12.0.8-1.el9sat.noarch
   postgresql-server-13.22-1.el9_6.x86_64
   postgresql-evr-0.0.2-3.el9sat.noarch
   postgresql-contrib-13.22-1.el9_6.x86_64
3. df -h
   Filesystem             Size  Used Avail Use% Mounted on
   devtmpfs               4.0M     0  4.0M   0% /dev
   tmpfs                  5.8G   64K  5.8G   1% /dev/shm
   tmpfs                  2.3G   11M  2.3G   1% /run
   /dev/mapper/rhel-root  148G  105G   44G  71% /
   /dev/sda1             1014M  233M  782M  23% /boot
   tmpfs                  1.2G  4.0K  1.2G   1% /run/user/0
4.  du -h /var/lib/pgsql/
   99G /var/lib/pgsql/data
   99G /var/lib/pgsql/

Expected behavior:

Below Check is not required as satellite 6.16 is already running on PostgreSQL 13 , (the postgresql 13 upgrade is already happened for 15→16)

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Check to make sure PostgreSQL 13 work directory has enough space for upgrade:

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Business Impact / Additional info: