cleanup: remove /rest from smsuapi.ws.address example
2.0.0-RC1

migration:
- not compliant with smsuapi < 2

configuration:
- removed defaults*.properties (for simplicity, only config.properties)
- since new smsuapi sends all SMS at once, there is no need to handle messageId anymore in smsuapimail
- follow maven convention for file locations

various:
- switch to apache licence v2.0 (esup-portail now follows jasig choice)