Restructure integration tests

itests
|_ common
|_ smoke
|	|_ embedded
|	|_ karaf
|_extra
|	|_ tomcat
|	|_ wildfly
|_ paxexam
 	|_ basic (deprecated)
Fix tomcat/tomee distros.

A module must never reference resources from other modules.
With a good build it is possible to reason about module resources in the context of this module alone.
Changing test resources cannot affect a binary distro.