Set log_size_max size for podman logs

The service logs after a while can be really huge.
This change is limiting log file size to 1GB.
The feature has been added into the podman containers.conf file in
podman 2.2.0 release [1], but on Centos 7, version is below 2.2.0.
According to the libpod.conf man [2], that option should be also
available in podman 1.6.4, but it is located in libpod.conf file.
More info [3].

[1] https://github.com/containers/podman/releases/tag/v2.2.0
[2] https://manpages.debian.org/unstable/podman/libpod.conf.5.en.html
[3] unifi-utilities/unifios-utilities#100

Depends-On: https://softwarefactory-project.io/r/c/software-factory/sf-ci/+/28529

Change-Id: Ia6071e5214644bdd126cf696cd437c140fa95c94

ansible/roles/sf-base/defaults/main.yml

@@ -24,3 +24,6 @@ base_sysctl:
   user.max_user_namespaces: 31089
   kernel.sysrq: 0
   vm.swappiness: 10
+
+# set 1000MB in bytes
+log_size_max: 1048576000

ansible/roles/sf-base/tasks/setup.yml

@@ -146,3 +146,11 @@
 - name: Trust crt
   shell: update-ca-trust
   when: new_crt is changed
+
+- name: Set max log limit in libpod configuration file
+  become: true
+  lineinfile:
+    path: /etc/containers/libpod.conf
+    regexp: "^max_log_size"
+    line: "max_log_size={{ log_size_max }}"
+    create: true