FIXED several issues regarding the creation of multiple servlet container instances (concurrency and multiple network interfaces problem).

Signed-off-by: Michael Grammling <m.grammling@external.telekom.de>
FIXED some NPEs and Maven build errors because of Servlet API 3 and 2.4 conflicts.

Signed-off-by: Michael Grammling <m.grammling@external.telekom.de>