copr-builders: better split image preparation and booting

roles/copr/backend/files/provision/provision_builder_tasks.yml

@@ -25,8 +25,8 @@
 
 - name: put infra repos into yum.repos.d
   copy: src=files/dnf/infra-tags.repo dest=/etc/yum.repos.d
-  # when:
-  # - preparing_image
+  when:
+    - preparing_image
 
 - name: put infra stg repos into yum.repos.d if staging
   copy: src=files/dnf/infra-tags-stg.repo dest=/etc/yum.repos.d
@@ -38,17 +38,15 @@
   file:
     path: /etc/yum.repos.d/fedora-updates-testing.repo
     state: absent
+  when:
+    - preparing_image
 
 - name: update the system
   dnf:
     state: latest
     name: "*"
-    exclude:
-      # https://bugzilla.redhat.com/show_bug.cgi?id=2047266
-      # This is important for the AWS images only.  Other images (like libvirt,
-      # IBM Cloud, etc.) are already updated.
-      - kernel-core
-  when: preparing_image
+  when:
+    - preparing_image
   register: system_updated
 
 - name: disable updates-testing, could be restored after update
@@ -239,6 +237,8 @@
 
 - name: mount cache filesystem on /var/cache/mock
   mount: path=/var/cache/mock state=mounted src=mock_cache_tmpfs fstype=tmpfs opts="size=32G"
+  when:
+    - starting_builder
 
 - name: Collect facts about builder hardware
   setup:
@@ -266,7 +266,6 @@
   when:
     - starting_builder
 
-
 - name: detect package versions
   package_facts: manager=auto