use SQ 5.6 API

Author: guwirth

pom.xml

@@ -154,7 +154,7 @@
     <license.owner>SonarOpenCommunity</license.owner>
     <license.mailto>http://github.com/SonarOpenCommunity/sonar-cxx</license.mailto>
     <maven.test.redirectTestOutputToFile>true</maven.test.redirectTestOutputToFile>
-    <sonar.version>5.6-RC2</sonar.version>
+    <sonar.version>5.6</sonar.version>
     <sslr.version>1.21</sslr.version>
     <sonar.pluginClass>org.sonar.plugins.cxx.CxxPlugin</sonar.pluginClass>
     <sonar.artifact.path>target/${project.artifactId}-${project.version}.jar</sonar.artifact.path>