Revert "SONAR-5117 fix compatibility of build with maven 3.0.x"

This reverts commit 514b752d87d4918cee373d8dd9c6ad1a3bfd183b.
Revert "SONAR-5117 Upgrade to Tomcat 7.0.52"

This reverts commit 469975855667211c189655a61c99d0d81cd8b243.