Fix tmpdir cleanup check

Error:

The conditional check '(tmpdir is not none) and (not tmpdir.skipped)
' failed. The error was: error while evaluating conditional ((tmpdir is not none) and (not tmpdir.skipped)
): 'dict object' has no attribute 'skipped'

The error appears to be in '/tmp/awx_143_zxsy5vyc/requirements_roles/glusterfs-nfs-ganesha/tasks/centos/_selinux.yml': line 58, column 7, but may
be elsewhere in the file depending on the exact syntax problem.

The offending line appears to be:

  always:
    - name: Cleanup tmpdir
      ^ here