Update to SonarQube plugin 3.1.1 and try to set version

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1889206 13f79535-47bb-0310-9956-ffa450edef68

build.gradle

@@ -20,7 +20,7 @@ buildscript {
     }
 
     dependencies {
-        classpath "org.sonarsource.scanner.gradle:sonarqube-gradle-plugin:3.0"
+        classpath "org.sonarsource.scanner.gradle:sonarqube-gradle-plugin:3.1.1"
     }
 }
 
@@ -215,6 +215,9 @@ subprojects {
 
 				// the Gradle run will report an invalid directory for 'ooxml-schema', but it seems to still work fine
 				property "sonar.coverage.jacoco.xmlReportPaths", "$projectDir/build/reports/jacoco/test/jacocoTestReport.xml"
+
+				// somehow the version was not use properly
+				property "sonar.projectVersion", version
             }
         }
     }