Bumped versions of spring-boot and jersey

Spring boot at 1.0.2.RELEASE
Jersey at 2.8.

Also removed milestone repositories for spring-boot since a .RELEASE is available in central.

All tests pass.

Please note that jersey 2.6 onwards is compiled with java 1.7 [Reference: https://jersey.java.net/documentation/latest/modules-and-dependencies.html] so we will now need a java 1.7 compiler to build and run the project.