Description of problem:
During the run of leapp in the overcloud nodes the process will be inhibited due to NFS mountpoints. 

To work around the issue one may need to unmount the share manually in the overcloud node. But it would be better approach to have the unmount automated and possible mount it after the upgrade automatically.

Version-Release number of selected component (if applicable):
16.1

How reproducible:
always

Steps to Reproduce:
1. Run the FFU process in 13 overcloud with mounted NFS
2.
3.

Actual results:
leapp upgrade inhibited

Expected results:
automatically proceed with the node upgrade




Additional info:

 - Piece of code for the step:
/usr/share/openstack-tripleo-heat-templates/deployment/tripleo-packages/tripleo-packages-baremetal-puppet.yaml:

~~~
        - name: system_upgrade_prepare step 4
          tags:
            - never
            - system_upgrade
            - system_upgrade_prepare
          when: step|int == 4
          block:
            - name: set leapp options
              shell: >
                leapp answer --section remove_pam_pkcs11_module_check.confirm=True --add                                                                    
              when: upgrade_leapp_enabled
 
            - name: run leapp upgrade (download packages)
              shell: >
                {% if upgrade_leapp_devel_skip|default(false) %}{{ upgrade_leapp_devel_skip }}{% endif %}                                                   
                leapp upgrade
                {% if upgrade_leapp_debug|default(true) %}--debug{% endif %}
                {% if upgrade_leapp_command_options|default(false) %}{{ upgrade_leapp_command_options }}{% endif %}                                         
              when: upgrade_leapp_enabled

        - name: system_upgrade_run step 4
          tags:
            - never
            - system_upgrade
            - system_upgrade_run
            # In case someone needs to re-run system_upgrade_run post-tasks
            # but doesn't want to reboot, they can run with
            # `--skip-tags system_upgrade_reboot`.
            - system_upgrade_reboot
          when:
            - step|int == 4
            - upgrade_leapp_enabled

~~~