Add SonarCloud scans to Travis runs

.travis.yml

@@ -2,6 +2,10 @@ language: java
 jdk:
   - oraclejdk8
 after_success:
+  - ./gradlew sonarqube \
+      -Dsonar.organization=github-apollo-rsps \
+      -Dsonar.host.url=https://sonarcloud.io \
+      -Dsonar.login="$SONARCLOUD_TOKEN"
   - ./gradlew jacocoTestReport
   - bash <(curl -s https://codecov.io/bash)
 before_cache:

build.gradle

@@ -1,6 +1,8 @@
 plugins {
-    id 'org.jetbrains.kotlin.jvm' version "1.2.60" apply(false)
+    id 'org.jetbrains.kotlin.jvm' version '1.2.60' apply(false)
+    id 'org.jetbrains.intellij' version '0.3.6' apply(false)
     id 'org.jmailen.kotlinter' version '1.16.0' apply(false)
+    id 'org.sonarqube' version '2.6.2'
 }
 
 allprojects {