fixed bug in client.check_version()

[fabregas]

For Kafka version <0.10 we have error log message on bootstrap:

[asyncio:1148][ERROR ] Task exception was never retrieved
future: <Task finished coro=<wait_for() done, defined at /usr/lib64/python3.5/asyncio/tasks.py:355> exception=CorrelationIdError('Correlation ids do not match: sent 1, recv 2',)>
Traceback (most recent call last):
File "/usr/lib64/python3.5/asyncio/tasks.py", line 239, in _step
result = coro.send(None)
File "/usr/lib64/python3.5/asyncio/tasks.py", line 392, in wait_for
return fut.result()
File "/usr/lib64/python3.5/asyncio/futures.py", line 274, in result
raise self._exception
kafka.errors.CorrelationIdError: CorrelationIdError: Correlation ids do not match: sent 1, recv 2

[codecov-io]

Current coverage is 95.84% (diff: 100%)

Merging #79 into master will increase coverage by <.01%

@@             master        #79   diff @@
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  Files             8          8          
  Lines          1609       1612     +3   
  Methods           0          0          
  Messages          0          0          
  Branches          0          0          
==========================================
+ Hits           1542       1545     +3   
  Misses           67         67          
  Partials          0          0          

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