Update resthub-web/resthub-web-server/pom.xml

Exclusion from cors-filter of servlet-api 2.5 version to avoid conflict with 3.0X
Update resthub-web/resthub-web-server/pom.xml
Merge pull request #174 from pierre-duchesne/master

Exclusion from cors-filter of servlet-api 2.5 version to avoid conflict with 3.0X