Update CI tests to directly use cpan packages (= use setup instructions

from README)
4 jobs for master in 47 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
failed #4880
debian allowed to fail
lint-perl

00:00:46

failed #4879
debian
test-perl

00:00:02

 
  Package Build
skipped #4881
generic debian
build-deb
 
  Package Check
skipped #4882
generic debian allowed to fail
lint-deb
 
Name Stage Failure
failed
lint-perl Test There is an unknown failure, please try again
lib/Unipoly/LDAP.pm source OK
lib/Unipoly/Group.pm source OK
lib/Unipoly/Member.pm source OK
t/002_index_route.t source OK
t/001_base.t source OK
public/dispatch.fcgi source OK
public/dispatch.cgi source OK
bin/app.pl source OK
ERROR: Job failed: exit code 1
failed
test-perl Test There is an unknown failure, please try again
Running with gitlab-ci-multi-runner 9.5.1 (96b34cc)
on generic-shared-1 (1c71cc2d)
Using Docker executor with image fedora:stable ...
Using docker image sha256:9423cf14676c6884777df175a6d7fc9b6702d412898fb49735a77e0919f05d56 for predefined container...
Pulling docker image fedora:stable ...
ERROR: Job failed: Error response from daemon: manifest for fedora:stable not found: manifest unknown: manifest unknown