.travis.yml in rdkafka-0.3.4 vs .travis.yml in rdkafka-0.3.5

@@ -2,19 +2,21 @@
 
 sudo: false
 
 env:
   global:
-    - CC_TEST_REPORTER_ID=0af2487f1cc190d4a5e23cd76182514e5b62aac5d59b6208a02fd518487b9ed8
+    - CC_TEST_REPORTER_ID=9f7f740ac1b6e264e1189fa07a6687a87bcdb9f3c0f4199d4344ab3b538e187e
 
 rvm:
   - 2.1
   - 2.2
   - 2.3
   - 2.4
+  - 2.5
 
 before_install:
+  - gem update --system
   - wget http://www.us.apache.org/dist/kafka/1.0.0/kafka_2.12-1.0.0.tgz -O kafka.tgz
   - mkdir -p kafka && tar xzf kafka.tgz -C kafka --strip-components 1
   - nohup bash -c "cd kafka && bin/zookeeper-server-start.sh config/zookeeper.properties &"
   - nohup bash -c "cd kafka && bin/kafka-server-start.sh config/server.properties &"
 
@@ -28,5 +30,6 @@
 script:
   - bundle exec rspec
 
 after_script:
   - ./cc-test-reporter after-build --exit-code $TRAVIS_TEST_RESULT
+  - killall -9 java