Description of problem:
Installer reset on an external DB setup fails, effectively blocking backup restore on that setup.

Version-Release number of selected component (if applicable):
6.10.3 snap 1

How reproducible:
always

Steps to Reproduce:
1. Have an external DB setup (SAT + DB host)
2. On the Satellite, run `satellite-installer --reset-data`

Actual results:
Installer fails:
2022-02-11 04:12:08 [NOTICE] [configure] 1250 configuration steps out of 1850 steps complete.
2022-02-11 04:13:37 [NOTICE] [configure] 1500 configuration steps out of 1850 steps complete.
2022-02-11 04:14:49 [ERROR ] [configure] 'pulpcore-manager migrate --noinput' returned 1 instead of one of [0]
2022-02-11 04:14:49 [ERROR ] [configure] /Stage[main]/Pulpcore::Database/Pulpcore::Admin[migrate --noinput]/Exec[pulpcore-manager migrate --noinput]/returns: change from 'notrun' to ['0'] failed: 'pulpcore-manager migrate --noinput' returned 1 instead of one of [0]
2022-02-11 04:14:49 [NOTICE] [configure] 1750 configuration steps out of 1850 steps complete.
2022-02-11 04:14:52 [NOTICE] [configure] System configuration has finished.

There were errors detected during install.

Expected results:
Successfull reset