Bump org.sonarqube from 6.2.0.5505 to 6.3.1.5724

Bumps org.sonarqube from 6.2.0.5505 to 6.3.1.5724.

---
updated-dependencies:
- dependency-name: org.sonarqube
  dependency-version: 6.3.1.5724
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

build.gradle

@@ -26,7 +26,7 @@ plugins {
     id 'com.github.ben-manes.versions' version '0.53.0'
     id 'io.github.goooler.osgi' version '0.8.6'
     id 'com.github.jk1.dependency-license-report' version '2.9'
-    id 'org.sonarqube' version '6.2.0.5505'
+    id 'org.sonarqube' version '6.3.1.5724'
     id 'org.apache.groovy-core'
     id 'java-test-fixtures'
     id 'org.apache.groovy-jacoco-aggregation'