Automatic merge from branch-5.3

* origin/branch-5.3:
  [maven-release-plugin] prepare for next development iteration
  [maven-release-plugin] prepare release 5.3-RC2

diff --cc plugins/sonar-xoo-plugin/pom.xml
Simple merge

diff --cc pom.xml
Simple merge

diff --cc sonar-batch-protocol/pom.xml
Simple merge

diff --cc sonar-plugin-api-deps/pom.xml
Simple merge

diff --cc sonar-ws/pom.xml
Simple merge