Update jetty to 9.1.3.v20140225
Add IPv6 support to HttpUriBuilder
Build against JDK 7 and JDK 8
Update NEWS and CHANGES
[maven-release-plugin] prepare release 0.87
[maven-release-plugin] prepare for next development iteration
Convert values of type Descriptor to Map

The current code breaks with java 8 due to an mbean that has a nested descriptor in one
of its operation descriptors.
Add missing test scope for jetty-servlet