cleanup pom.xml: add xmlns (to please eclipse)
OSSRH-10160 replace groupId org.esupportail with org.esup-portail ("-" is allowed in groupId)
pom.xml: fix ranges alike [1.2,2) which include 2.0.0-RC1. [1.2,1.99] is better!

I wish we had versions alike node.js : ~1.2 or 1.x
pom.xml: use esup-smsu-api 2.0.0-RC2 (which has valid deps, no need to handle it anymore)