playbook: Fix Debian 9 repository information

As currently Debian 9 key on OBS is not valid, we need to update apt
information with allowing insecure repositories.

Even if repository role uses debian9-aptconf as dependency, it does not
update repository information *after* adding the repository. So just
update it.

/reviewed-on nexedi/slapos.package!42

playbook/roles/repository/tasks/main.yml

@@ -36,6 +36,10 @@
     apt_repository: repo='deb {{ base_open_build_url }}/Debian_9.0/ ./' state=present update_cache=no
     when: ansible_distribution == "Debian" and ansible_distribution_major_version == "9"
 
+  - name: Update repos for debian 9
+    shell: apt update --allow-insecure-repositories
+    when: (ansible_distribution == "Debian" and ansible_distribution_major_version == "9") or (ansible_distribution == "Ubuntu" and ansible_distribution_major_version == "17")
+
   - name: Install Debian 8 repository
     apt_repository: repo='deb {{ base_open_build_url }}/Debian_8.0/ ./' state=present
     when: ansible_distribution == "Debian" and ansible_distribution_major_version == "8"