Use new method for specifying custom rules
Merge branch 'feature/deprecate-extensions-rules' of git://github.com/jmecosta/sonar-cxx into jmecosta-feature/deprecate-extensions-rules

Conflicts:
	sonar-cxx-plugin/src/test/java/org/sonar/plugins/cxx/cppcheck/CxxCppCheckRuleRepositoryTest.java
Reenable a test disabled in the last merge (?)