kimchi should report more log info.

[shaohef]

$ uname -ro
3.9.8-100.fc17.x86_64 GNU/Linux
$ libvirtd --version
libvirtd (libvirt) 0.10.1

ERROR:cherrypy.error.42875344:[17/Aug/2013:21:18:15] HTTP Traceback (most recent call last):
File "/usr/lib/python2.7/site-packages/cherrypy/_cprequest.py", line 656, in respond
response.body = self.handler()
File "/usr/lib/python2.7/site-packages/cherrypy/lib/encoding.py", line 188, in call
self.body = self.oldhandler(_args, *_kwargs)
File "/usr/lib/python2.7/site-packages/cherrypy/_cpdispatch.py", line 34, in call
return self.callable(_self.args, *_self.kwargs)
File "/home/shhfeng/work/workdir/kimchi/src/kimchi/controller.py", line 147, in index
return self.delete()
File "/home/shhfeng/work/workdir/kimchi/src/kimchi/controller.py", line 131, in delete
fn(*self.model_args)
File "/home/shhfeng/work/workdir/kimchi/src/kimchi/model.py", line 164, in vm_delete
vol = conn.storageVolLookupByPath(path)
File "/usr/lib64/python2.7/site-packages/libvirt.py", line 3234, in storageVolLookupByPath
if ret is None:raise libvirtError('virStorageVolLookupByPath() failed', conn=self)
libvirtError: Storage volume not found: no storage vol with matching path

expect:
kimchi report the vol path.