Try increasing sonar scanner heap size in travis builds

.travis.yml

@@ -24,8 +24,11 @@ cache:
     - $HOME/.sonar/cache/
     - .gradle
 
+env:
+  - SONAR_SCANNER_OPTS="-Xmx2048m" 
+
 script:
-  - travis_wait 45 |
+  - |
     if [ "$TRAVIS_JDK_VERSION" == "oraclejdk11" ]; then
       ./gradlew sonarqube codeCoverageReport -Dsonar.verbose=true
     else