Apply /etc/environment for runtime after adjustment

Depends-On: https://review.opendev.org/c/openstack/openstack-ansible-openstack_hosts/+/766030
Change-Id: I94008de1fe97400ab37de39d03599fa9f53ab3f0

scripts/gate-check-commit.sh

@@ -178,6 +178,11 @@ else
     # Log some data about the instance and the rest of the system
     log_instance_info
 
+    # Reload environment file and apply variables for the session
+    set -a
+    . /etc/environment
+    set +a
+
     # Once setup-hosts is complete, we should gather facts for everything
     # (now including containers) so that the fact cache is complete for the
     # remainder of the run.

tests/roles/bootstrap-host/tasks/prepare_aio_config.yml

@@ -112,6 +112,12 @@
   when:
     - ansible_selinux.status == "enabled"
 
+- name: Get systemd version
+  command: "rpm -q systemd"
+  changed_when: false
+  register: systemd_version
+  when: ansible_os_family | lower == 'redhat'
+
 - name: Set the user_variables
   config_template:
     src: "{{ bootstrap_user_variables_template }}"

tests/roles/bootstrap-host/templates/user_variables.aio.yml.j2

@@ -13,6 +13,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+{% if ansible_os_family | lower == 'redhat' %}
+deployment_environment_variables:
+  LIBSYSTEMD_VERSION: {{ systemd_version.stdout_lines[0].split('-')[1] }}
+{% endif %}
+
 ## General options
 debug: True