duplicated class ImageDownloadModuleMetaDataError definition in exception.py

[wangpan]

The below commit had a mistake which added two same classes 'ImageDownloadModuleMetaDataError':

commit 6f9ed562d5f6df1dc16029dcaffd4d2e6601099d
Author: John Bresnahan <email address hidden>
Date: Thu Jul 18 10:39:33 2013 -1000

    Add plug-in modules for direct downloads of glance locations

    ......

+class ImageDownloadModuleMetaDataError(ImageDownloadModuleError): # here
+ msg_fmt = _("The metadata for this location will not work with this "
+ "module %(module)s. %(reason)s.")
+
+
+class ImageDownloadModuleNotImplementedError(ImageDownloadModuleError):
+ msg_fmt = _("The method %(method_name)s is not implemented.")
+
+
+class ImageDownloadModuleMetaDataError(ImageDownloadModuleError): # and here
+ msg_fmt = _("The metadata for this location will not work with this "
+ "module %(module)s. %(reason)s.")
+
+
+class ImageDownloadModuleConfigurationError(ImageDownloadModuleError):
+ msg_fmt = _("The module %(module)s is misconfigured: %(reason)s.")

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/45812

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/45812
Committed: http://github.com/openstack/nova/commit/5107b6730340f52dc7fde5b3795ed7cc4e89ebd1
Submitter: Jenkins
Branch: master

commit 5107b6730340f52dc7fde5b3795ed7cc4e89ebd1
Author: Wangpan <email address hidden>
Date: Tue Sep 10 12:25:19 2013 +0800

    Removed duplicated class in exception.py

    This commit 6f9ed562d5f6df1dc16029dcaffd4d2e6601099d had a mistake
    which added two same classes ImageDownloadModuleMetaDataError to
    exception.py, clear it now.

    fixes bug 1223165
    Change-Id: I2e7a30a63ab24d1ffb9f33a14db65c6fb3594cb0