Don't clean up coverage tests

.travis.yml

@@ -1,4 +1,6 @@
 language: java
+jdk:
+  - openjdk8
 env:
   global:
   - CC_TEST_REPORTER_ID=5652c0db4c6b50a85b5ec103eedd3db9ab43c6605e106394bc5f784ed548c4ba
@@ -16,7 +18,6 @@ before_script:
 - ".travis/before-script.sh"
 script:
 - mvn test
-after_script:
 - "./cc-test-reporter format-coverage -d -t jacoco ./target/jacoco-ut/jacoco.xml"
 - "./cc-test-reporter upload-coverage -d"
 before_deploy:
@@ -31,6 +32,7 @@ deploy:
     repo: trickl/clock
     all_branches: true
 - provider: releases
+  skip_cleanup: true
   api_key:
     secure: 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
   file: ".travis.yml"