[FIX] TypeError on LambdaClient(transport=...)

[alanjds]

Fixes for TypeError: __init__() got multiple values for keyword argument 'transport'

The code o LambdaClient would error if transport is provided:

>>> LambdaClient(transport='ANYTHING')
Traceback (most recent call last):
  File "<ipython-input-15-12899bb0d00a>", line 1, in <module>
    LambdaClient(transport='ANYTHING')
  File "/Users/alanjds/.virtualenvs/sandbox36/lib/python3.6/site-packages/raven/contrib/awslambda/__init__.py", line 58, in __init__
    super(LambdaClient, self).__init__(*args, transport=transport, **kwargs)
TypeError: __init__() got multiple values for keyword argument 'transport'

The culprit is:

raven-python/raven/contrib/awslambda/__init__.py

Line 57 in 2c4ed64

transport = kwargs.get('transport', HTTPTransport)

Because it get()s instead of pop(), **kwargs will keeps transport kw and will be provided 2 times:

raven-python/raven/contrib/awslambda/__init__.py

Line 58 in 2c4ed64

super(LambdaClient, self).__init__(*args, transport=transport, **kwargs)

[ashwoods]

thx!