adding traefik as tls facade, use docker.reqesidta as domain for the app by pointing this domain to localhost in /etc/hosts

Merge branch 'ssa_server_session_handling' of git.ecsec.de:oec/reqesidta-prototype/eid-server into ssa_server_session_handling

add script for creating stuff needed for ssl between poseidas and ssa-server, remove obsolete ssl stuff from poseidas and change poseidas config and ssa-server docker stuff

change SOAP config in poseidas, disable SSL in poseidas, start working on SOAP client in ssa_server, add xsd stuff into ssa-server needed for SOAP consumption

change java version for ssa-server to 1.8 to get codegen running, add eID wsdl stuff, add codegen stuff for wsdl client code to pom.xml