TCK Migration : Userguide & assertions  (#1059)

* Move the userguide, assertion docs, exclude list & ReleaseNotes for 3.0.1

* initial update to the tck userguide for 3.1 release

* address tck doc migration review comments

- reverted change in jersey-tck/pom.xml

* include spec and api assertions for 3.1

* adding the EFTL License file in docs folder

The LICENSE_EFTL.md file will need to be present in the EFTL TCK bundle.

* correct assertion file oddities

- JAX-RS to JAXRS in spec assertions
- remove  OLD javadoc assertions

* fix review comments, rename jtx file