SONAR-7058 Update bundled Java plugin to 3.7.1

pom.xml

@@ -55,7 +55,7 @@
 
   <properties>
     <sonarUpdateCenter.version>1.13</sonarUpdateCenter.version>
-    <sonarJava.version>3.6</sonarJava.version>
+    <sonarJava.version>3.7.1</sonarJava.version>
     <sonarGit.version>1.0</sonarGit.version>
     <sonarSvn.version>1.2</sonarSvn.version>
     <h2.version>1.3.176</h2.version>