Updates import #11

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an-dev wants to merge 4 commits intorobinhood:masterfrom

Commits on Jul 27, 2017

Updates import for TwilioRestClient and TwilioRestException to use 6.x twilio python sdk
Andy
committed
Replaces TwilioRestException in test module
Andy
committed
pep8
Andy
committed
removes trailing whitespace
Andy
committed