Release note for 2.0.9

Added version-2.0.8.html

Added version-2.0.7.html

Release not and version for 2.0.6

Version 2.0.5 in pom.xml and release note.

Added script for deployment to systems-accepted

Set nexus repository to systems-accepted

CSTSAPI-68: Fixes STC parameter name creation, subsystem and instance…

… are not seperated by / anymore + adds a related test

Release Note and version in pom.xml for 2.0.1

CSTSAPI-60: check number of threads, and refine test