type() method should be replaced with isinstance() in nova/utils.py

[lizheming]

In nova/utils.py, a func use the "type" method to determine the type. It's bertter to use the "isinstance" method instead.
The code is:
def convert_version_to_int(version):
    try:
        if type(version) == str:
            version = convert_version_to_tuple(version)
       if type(version) == tuple:
           return reduce(lambda x, y: (x * 1000) + y, version)
    except Exception:
           raise exception.NovaException(message="Hypervisor version invalid.")

this bug is fixed in glance:
https://review.openstack.org/#/c/65611/4

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/65856

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/65856
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=9f7c5bf5ad38237f2adac980afb69fcdb26678a3
Submitter: Jenkins
Branch: master

commit 9f7c5bf5ad38237f2adac980afb69fcdb26678a3
Author: lizheming <email address hidden>
Date: Fri Jan 10 11:43:37 2014 +0800

    replace type() to isinstance() in nova

    In nova/utils.py, a func use the "type" method to
    determine the type. It's bertter to use the "isinstance"
    method instead.this bug is fixed in glance:
    https://review.openstack.org/#/c/65611/4

    Change-Id: I10d25d2308436239c50cf3932c212e22c45f92a8
    Closes-Bug: #1267300