JERSEY-1891: "SSE EventSource.register(EventListener, String) throws NPE" fixed
	PS2: test fixed

Change-Id: I2638feb82c46b6ed1b562347520df26d662c4a91
Merge "JERSEY-1891: "SSE EventSource.register(EventListener, String) throws NPE" fixed 	PS2: test fixed"
Merge branch 'master' of github.com:jersey/jersey