Add SonarQube integration again

Reading through the docs it became clear that the secure
token is repository specific so that was the mistake.

.travis.yml

@@ -5,8 +5,14 @@ android:
     - build-tools-26.0.0
     - android-26
     - extra-android-m2repository
+addons:
+  sonarcloud:
+    organization: "markusfisch-github"
+    token:
+      secure: "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"
 script:
   - bash gradlew build
+  - bash gradlew sonarqube
 branches:
   only:
     - master

build.gradle

@@ -20,6 +20,10 @@ buildscript {
 	}
 }
 
+plugins {
+	id 'org.sonarqube' version '2.5'
+}
+
 allprojects {
 	repositories {
 		jcenter()