No key in instance causes uec-describe-cloud to crash

[Torsten Spindler]

If an instance without key has been launched, uec-describe-cloud crashes with the following backtrace:

$ uec-describe-cloud
Traceback (most recent call last):
  File "/usr/bin/uec-describe-cloud", line 65, in <module>
    uec_describe_cloud.ParseAndPrint()
  File "/usr/lib/pymodules/python2.6/uec_describe_cloud/uec_describe_cloud.py", line 148, in __init__
    instances = ParseEucaDescribeInstances().parse()
  File "/usr/lib/pymodules/python2.6/uec_describe_cloud/uec_describe_cloud.py", line 119, in parse
    instances.append(Instance(line))
  File "/usr/lib/pymodules/python2.6/uec_describe_cloud/uec_describe_cloud.py", line 78, in __init__
    self.cluster, self.eki = tokens[0:12]
ValueError: need more than 11 values to unpack