add setup-snapshot.yml used to prepare testing snapshots

When running CI tests, test performance can be improved by creating a
snapshot image to use for the test, pre-installed with packages used by
the role tests.  The CI system can use tests/setup-snapshot.yml to
prepare the snapshot image.  Rather than having a list of packages to
install in multiple places, the code which ensures the facts and
variables is moved to a separate tasks/set_facts.yml so that the setup
playbook can use `tasks_from: set_facts.yml` to get the list of network
packages to install.  NOTE: The network role developers should add
additional packages to setup-snapshot.yml for other packages installed
by other tests.

Signed-off-by: Rich Megginson <rmeggins@redhat.com>

tasks/main.yml

@@ -2,20 +2,7 @@
 # get service facts, used in defaults/main.yml
 ---
 - name: Ensure ansible_facts used by role
-  setup:
-    gather_subset: min
-  when: not ansible_facts.keys() | list |
-    intersect(__network_required_facts) == __network_required_facts
-  no_log: true
-
-- name: Check which services are running
-  service_facts:
-  no_log: true
-
-# needed for ansible_facts.packages
-- name: Check which packages are installed
-  package_facts:
-  no_log: true
+  include_tasks: tasks/set_facts.yml
 
 - name: Print network provider
   debug:

tasks/set_facts.yml

@@ -0,0 +1,17 @@
+# SPDX-License-Identifier: BSD-3-Clause
+---
+- name: Ensure ansible_facts used by role are present
+  setup:
+    gather_subset: min
+  when: not ansible_facts.keys() | list |
+    intersect(__network_required_facts) == __network_required_facts
+  no_log: true
+
+- name: Check which services are running
+  service_facts:
+  no_log: true
+
+# needed for ansible_facts.packages
+- name: Check which packages are installed
+  package_facts:
+  no_log: true

tests/setup-snapshot.yml

@@ -0,0 +1,12 @@
+- hosts: all
+  tasks:
+    - name: Set facts used by role
+      include_role:
+        name: linux-system-roles.network
+        tasks_from: set_facts.yml
+        public: true
+
+    - name: Install test packages
+      package:
+        name: "{{ network_packages }}"
+        state: present