Set default version to 4.15; add feature to install olm via rpm

This commit provides few features related to that project:
- added workaround when the version file does not exists,
  so clean setup of the MicroShift  4.15 was not possible
- added a feature to setup the OLM via MicroShift RPM package

defaults/main.yaml

@@ -39,10 +39,10 @@ firewalld_rules_permament: true
 use_copr_microshift: false
 
 # The Microshift version that is available in the repository.
-microshift_version: 4.14
+microshift_version: 4.15
 
 # Default settings from /etc/microshift/config.yaml.default
-# https://github.com/openshift/microshift/blob/release-4.14/packaging/microshift/config.yaml
+# https://github.com/openshift/microshift/blob/release-4.15/packaging/microshift/config.yaml
 microshift_config: {}
 #  apiServer:
 #    advertiseAddress: ""
@@ -71,7 +71,7 @@ microshift_config: {}
 #    nodeIP: ""
 
 # Default settings from /etc/microshift/lvmd.yaml.default
-# https://github.com/openshift/microshift/blob/release-4.14/packaging/microshift/lvmd.yaml
+# https://github.com/openshift/microshift/blob/release-4.15/packaging/microshift/lvmd.yaml
 microshift_lmvd: {}
 # socket-name: /run/lvmd/lvmd.socket
 # device-classes:
@@ -85,7 +85,7 @@ microshift_lmvd: {}
 #       - ""
 
 # Default settings from /etc/microshift/ovn.yaml.default
-# https://github.com/openshift/microshift/blob/release-4.14/packaging/microshift/ovn.yaml
+# https://github.com/openshift/microshift/blob/release-4.15/packaging/microshift/ovn.yaml
 microshift_ovn: {}
 # mtu: 1500
 
@@ -96,6 +96,7 @@ microshift_ovn: {}
 # Install the OLM - https://olm.operatorframework.io/
 setup_olm: false
 # https://github.com/operator-framework/operator-lifecycle-manager/releases
+microshift_olm_package: true
 olm_version: "v0.28.0"
 
 # Version of the Operator SDK

tasks/microshift.yaml

@@ -24,6 +24,20 @@
   notify: Restart Microshift
   when: not use_copr_microshift
 
+- name: Check if version file exists
+  become: true
+  ansible.builtin.stat:
+    path: /var/lib/microshift/version
+  register: _microshift_version_file
+
+- name: "Create a version file if does not exists with version {{ microshift_version }}.0"
+  become: true
+  when: not _microshift_version_file.stat.exists
+  ansible.builtin.copy:
+    content: |
+      {{ microshift_version }}.0
+    dest: /var/lib/microshift/version
+
 - name: Change Microshift configuration files
   become: true
   ansible.builtin.copy: