simplify project folder structure

roles/linux_container/tasks/ume.yml

@@ -0,0 +1,8 @@
+---
+- name: change root user password in container
+  ansible.builtin.shell:
+    cmd: |-
+      lxc exec {{ lte_container_name }} -- \
+          bash -c \
+          'echo "root:{{ lte_container_root_pwd }}" | chpasswd'
+  changed_when: false