Error while upgrading RedHat Satellite or Capsule: "mv: inter-device move failed: ‘/usr/share/foreman-proxy/.ssh’ to ‘/var/lib/foreman-proxy/ssh/.ssh’; unable to remove target: Directory not empty"

Issue

• Error upgrading Satellite / capsule during the installation of the rubygem-smart_proxy_remote_execution_ssh.noarch package:

  [root@example01 ~]# yum update
  Loaded plugins: aliases, changelog, enabled_repos_upload, kabi, langpacks,
                : package_upload, product-id, search-disabled-repos, subscription-
                : manager, tmprepo, verify, versionlock
  Loading support for Red Hat kernel ABI
  Resolving Dependencies
  --> Running transaction check
  ---> Package rubygem-smart_proxy_remote_execution_ssh.noarch 0:0.2.0-3.el7sat will be updated
  ---> Package rubygem-smart_proxy_remote_execution_ssh.noarch 0:0.2.1-2.el7sat will be an update
  --> Finished Dependency Resolution
  
  Dependencies Resolved
  
  ================================================================================
   Package   Arch   Version        Repository                                Size
  ================================================================================
  Updating:
   rubygem-smart_proxy_remote_execution_ssh
             noarch 0.2.1-2.el7sat rhel-7-server-satellite-capsule-6.6-rpms  25 k
  
  Transaction Summary
  ================================================================================
  Upgrade  1 Package
  
  Total download size: 25 k
  
  Is this ok [y/d/N]: y
  Downloading packages:
  No Presto metadata available for rhel-7-server-satellite-capsule-6.6-rpms
  Running transaction check
  Running transaction test
  Transaction test succeeded
  Running transaction
  mv: inter-device move failed: ‘/usr/share/foreman-proxy/.ssh’ to ‘/var/lib/foreman-proxy/ssh/.ssh’; unable to remove target: Directory not empty
  error: %pre(rubygem-smart_proxy_remote_execution_ssh-0.2.1-2.el7sat.noarch) scriptlet failed, exit status 1
  Error in PREIN scriptlet in rpm package rubygem-smart_proxy_remote_execution_ssh-0.2.1-2.el7sat.noarch
  Uploading Package Profile
  Loaded plugins: kabi, langpacks, product-id, subscription-manager, versionlock
  Loading support for Red Hat kernel ABI
  rubygem-smart_proxy_remote_execution_ssh-0.2.0-3.el7sat.noarch was supposed to be removed but is not!
    Verifying  : rubygem-smart_proxy_remote_execution_ssh-0.2.0-3.el7sat.no   1/2
    Verifying  : rubygem-smart_proxy_remote_execution_ssh-0.2.1-2.el7sat.no   2/2
  
  Failed:
    rubygem-smart_proxy_remote_execution_ssh.noarch 0:0.2.0-3.el7sat
    rubygem-smart_proxy_remote_execution_ssh.noarch 0:0.2.1-2.el7sat