iser target prefix default value is incorrect

The file cinder/volume/driver.py has incorrect default value for iser_target_prefix:
on one hand the conf default value is iser_target_prefix='iqn.2010-10.org.openstack:',
but the ISERTgtAdm class in cinder/brick/iscsi/iscsi.py has a default value target_prefix='iqn.2010-10.org.iser.openstack:'.
The second one is correct, the prefix should contain the 'iser' part.

The traceback in volume.log:
8e436fad61750c0492d56f - - -] Exception during message handling: Resource could not be found.
2014-10-27 09:35:06.041 23646 TRACE oslo.messaging.rpc.dispatcher Traceback (most recent call last):
2014-10-27 09:35:06.041 23646 TRACE oslo.messaging.rpc.dispatcher File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 137, in _dispatch_and_reply
2014-10-27 09:35:06.041 23646 TRACE oslo.messaging.rpc.dispatcher incoming.message))
2014-10-27 09:35:06.041 23646 TRACE oslo.messaging.rpc.dispatcher File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 180, in _dispatch
2014-10-27 09:35:06.041 23646 TRACE oslo.messaging.rpc.dispatcher return self._do_dispatch(endpoint, method, ctxt, args)
2014-10-27 09:35:06.041 23646 TRACE oslo.messaging.rpc.dispatcher File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 126, in _do_dispatch
2014-10-27 09:35:06.041 23646 TRACE oslo.messaging.rpc.dispatcher result = getattr(endpoint, method)(ctxt, **new_args)
2014-10-27 09:35:06.041 23646 TRACE oslo.messaging.rpc.dispatcher File "/usr/lib/python2.6/site-packages/osprofiler/profiler.py", line 105, in wrapper
2014-10-27 09:35:06.041 23646 TRACE oslo.messaging.rpc.dispatcher return f(*args, **kwargs)
2014-10-27 09:35:06.041 23646 TRACE oslo.messaging.rpc.dispatcher File "/usr/lib/python2.6/site-packages/cinder/volume/manager.py", line 875, in initialize_connection
2014-10-27 09:35:06.041 23646 TRACE oslo.messaging.rpc.dispatcher volume)
2014-10-27 09:35:06.041 23646 TRACE oslo.messaging.rpc.dispatcher File "/usr/lib/python2.6/site-packages/osprofiler/profiler.py", line 105, in wrapper
2014-10-27 09:35:06.041 23646 TRACE oslo.messaging.rpc.dispatcher return f(*args, **kwargs)
2014-10-27 09:35:06.041 23646 TRACE oslo.messaging.rpc.dispatcher File "/usr/lib/python2.6/site-packages/cinder/volume/drivers/lvm.py", line 548, in create_export
2014-10-27 09:35:06.041 23646 TRACE oslo.messaging.rpc.dispatcher return self._create_export(context, volume)
2014-10-27 09:35:06.041 23646 TRACE oslo.messaging.rpc.dispatcher File "/usr/lib/python2.6/site-packages/cinder/volume/drivers/lvm.py", line 560, in _create_export
2014-10-27 09:35:06.041 23646 TRACE oslo.messaging.rpc.dispatcher self.configuration)
2014-10-27 09:35:06.041 23646 TRACE oslo.messaging.rpc.dispatcher File "/usr/lib/python2.6/site-packages/cinder/volume/iscsi.py", line 57, in create_export
2014-10-27 09:35:06.041 23646 TRACE oslo.messaging.rpc.dispatcher conf.iscsi_write_cache)
2014-10-27 09:35:06.041 23646 TRACE oslo.messaging.rpc.dispatcher File "/usr/lib/python2.6/site-packages/cinder/brick/iscsi/iscsi.py", line 237, in create_iscsi_target
2014-10-27 09:35:06.041 23646 TRACE oslo.messaging.rpc.dispatcher raise exception.NotFound()
2014-10-27 09:35:06.041 23646 TRACE oslo.messaging.rpc.dispatcher NotFound: Resource could not be found.

Please notice the juno/stable branch in openstack-cinder repository has the correct value: https://github.com/openstack/cinder/blob/stable/juno/cinder/volume/driver.py#L142, we tested the upstream cinder code in Mellanox and it works.

Build details:
{"build_id": "2014-10-24_15-03-21", "ostf_sha": "f47fd1d66a7255213ee075d5c11b8f111f922000", "build_number": "177", "auth_required": true, "api": "1.0", "nailgun_sha": "c3c0c41a786818f6a0350a3ada4ec5df739dae0b", "production": "docker", "fuelmain_sha": "b48ebc3d09168e75494b238d239f5277eda94d6d", "astute_sha": "97eea90efe0a1f17b4934919d6e459d270c10372", "feature_groups": ["experimental"], "release": "6.0", "release_versions": {"2014.2-6.0": {"VERSION": {"build_id": "2014-10-24_15-03-21", "ostf_sha": "f47fd1d66a7255213ee075d5c11b8f111f922000", "build_number": "177", "api": "1.0", "nailgun_sha": "c3c0c41a786818f6a0350a3ada4ec5df739dae0b", "production": "docker", "fuelmain_sha": "b48ebc3d09168e75494b238d239f5277eda94d6d", "astute_sha": "97eea90efe0a1f17b4934919d6e459d270c10372", "feature_groups": ["experimental"], "release": "6.0", "fuellib_sha": "349ef85e33497b315b56a3b74ef9f272bc8eb6e8"}}}, "fuellib_sha": "349ef85e33497b315b56a3b74ef9f272bc8eb6e8"}