Comment 34 for bug 1253980

Reviewed: https://review.openstack.org/62912
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=ca38774ebcf5b67d16c202c8f218c0c433973ca9
Submitter: Jenkins
Branch: stable/havana

commit ca38774ebcf5b67d16c202c8f218c0c433973ca9
Author: Ryan Moore <email address hidden>
Date: Fri Nov 29 14:21:19 2013 +0000

    use 'os_type' in ephemeral filename only if mkfs defined

    Currently for undefined os-types it will use the default mkfs
    command, but use the meta 'os_type' in the name of the
    ephemeral file (e.g. ephemeral_20_abcdef). Which can result
    in a lot of files (DoS?)
    This change will only use 'os_type' in the ephemeral filename
    if there is a specific mkfs command defined, otherwise it will
    use 'default' (e.g. ephemeral_20_default)

    Modifed the tests to test for:
      os_type=''
      os_type=None
      os_type='test' - with no mkfs command specified
      os_type='test' - with a mkfs command specified

    Closes-Bug: 1253980

    Backport of Original Change-Id: Ie4c10f99ce690c5e4ef181624bd688c38923855c
    to stable/havana

    Change-Id: Ifa2b94e79dabd586d7e904da247d099360229313