Test for Events Stream should deduplicate results with set

[carycheng]

No description provided.

[boxcla]

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[coveralls]

Pull Request Test Coverage Report for Build 1817

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 4 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+0.6%) to 61.246%

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Files with Coverage Reduction	New Missed Lines	%
src/main/java/com/box/sdk/EventStream.java	1	87.5%
src/main/java/com/box/sdk/RealtimeServerConnection.java	3	80.0%

Totals
Change from base Build 1815:	0.6%
Covered Lines:	4885
Relevant Lines:	7976

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💛 - Coveralls