kie-server: add cargo config for jetty8x, tomcat7x and eap63
kie-server: execute the integration tests using failsafe plugin
kie-server: add profile for custom-containers not managed by cargo
kie-server: define cargo-plugin version in one place

 * the version needs to be eventually moved to
   kie-parent-metadata
kie-server: use dynamic port for integ. tests execution
kie-server: move cargo-maven2-plugin version to kie-parent-metadata
kie-server: remove TJWS as it is not used anymore
kie-server: clean-up the integ. tests