playbook: Remove build.opensuse.org key on every upgrade/setup.

This key has a short expiration period which becomes impractical check expiration date all the run, so
I am removing and reading later the key as upgrade happens once a month.

playbook/roles/repository/tasks/main.yml

@@ -3,6 +3,10 @@
     apt_key: id=1A716324 state=absent
     when: ansible_distribution == "Debian"
 
+  - name: Remove {{ base_open_build_url }} key (and add later) on every upgrade, as expiration date is quite short (2 months).
+    apt_key: id=94A63987 state=absent
+    when: ansible_distribution == "Debian"
+
   - file: path=/etc/apt/sources.list.d/re6stnet.list state=absent
     when: ansible_distribution == "Debian"