Fixed BasicAuth signRequest

[rj93]

When creating a Enterprise stream it would fail to authenticate using BasicAuth due to the signRequest being empty

[coveralls]

Changes Unknown when pulling 3423881 on rj93:master into * on twitter:master*.

[bobber205]

I tried this and I get

org.apache.http.conn.HttpHostConnectException: Connection to http://gnip-stream.twitter.com refused

whenever it tries to connect. What's up?

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