add main.yaml for olm task

roles/olm/tasks/main.yaml

@@ -0,0 +1,9 @@
+---
+# do any asserts here
+
+- include_tasks: install.yaml
+  when: operator_lifecycle_manager_install | bool
+
+- include_tasks: remove.yaml
+  when: operator_lifecycle_manager_remove | bool
+