JERSEY-2271: Added support for simplified and extended WADL

Change-Id: I25eefe3d2512ce11e5704c3075544b821f9f7a87
Changed copyright years in pom.xml's.

Change-Id: Ic71353938c2a80725b4480596ef572a7e42a536f
Updated Jersey version in performance tests to 2.6-SNAPSHOT.

Change-Id: I253d5e6adc6bae7c1bee8de72dd5d00c9808280e
[maven-release-plugin] prepare release 2.5.1

Change-Id: If3415e30b0350696a18017411da034a830e1f439
[maven-release-plugin] prepare for next development iteration

Change-Id: I5bf1ec23af0f1de0a3db7fb74432b68f0aea9cfb
Added null check for mediatype.