Fix some quality flaws

diff --cc plugins/sonar-core-plugin/src/main/java/org/sonar/plugins/core/issue/IssueTrackingResult.java
Simple merge

diff --cc sonar-duplications/src/main/java/org/sonar/duplications/detector/suffixtree/Search.java
Simple merge

diff --cc sonar-duplications/src/main/java/org/sonar/duplications/token/TokenQueue.java
Simple merge

diff --cc sonar-plugin-api/src/main/java/org/sonar/api/config/PropertyDefinitions.java
Simple merge