Merge autopkgtest-cloud:dbconfig-common-psql into autopkgtest-cloud:master

[Brian Murray]

The dbconfig-common autopkgtest is logging the following in it's log:

dbconfig-common: dumping pgsql database fefifofum to /var/tmp/db-test-pgsql-migration.fefifofum.2023-01> runuser --user root -- /bin/sh -c "env HOME='/tmp/dbconfig-common.psql_home.3mDyrc' PGPASSFILE='/tmp/db> unable to connect to postgresql server.
error encountered dumping database:
psql: error: could not translate host name "someserver" to address: Temporary failure in name resolution

The test may be failing for due to this or other reasons. Either way the failure is considered a temporary one because the string "Temporary failure in name resolution" is treated to be an infrastructure issue e.g. the archive mirror being down. The tests are continuing to loop and this change seems like the most expedient way to break the loop.

[Paride Legovini (paride)]

Looks good and safe, thanks!

review: Approve

diff --git a/charms/focal/autopkgtest-cloud-worker/autopkgtest-cloud/worker/worker b/charms/focal/autopkgtest-cloud-worker/autopkgtest-cloud/worker/worker
index 471ce53..4fea11f 100755
--- a/charms/focal/autopkgtest-cloud-worker/autopkgtest-cloud/worker/worker
+++ b/charms/focal/autopkgtest-cloud-worker/autopkgtest-cloud/worker/worker
@@ -137,6 +137,7 @@ FAIL_PKG_STRINGS = {'systemd*': ['timed out waiting for testbed to reboot',
 
 # Exemptions from TEMPORARY_TEST_FAIL_STRINGS / FAIL_{PKG_,}STRINGS
 OK_PKG_STRINGS = {
+        'dbconfig-common': ['Temporary failure in name resolution'],
         'debspawn': ['Temporary failure resolving \'archive.ubuntu.com\'',
                      'Temporary failure resolving \'ports.ubuntu.com\'',
                      'Temporary failure resolving \'ftpmaster.internal\''],