configure jetty to exit on error
pom.xml: fix use of esup-smsu-api from maven central
pom.xml: add spring-tx

needed for loops in spring injection?

mentioned here: http://www.mkyong.com/spring/java-lang-classnotfoundexception-org-springframework-transaction-transactionexception/
web.xml: remove schema since metadata-complete/absolute-ordering need more recent schema

and i don't know if putting a more recent schema would break on older servlet containers? /o\