NO-JIRA: Amend travis descriptor

* switch to openjdk
* remove defunct sudo:false
diff --git a/.travis.yml b/.travis.yml
index 46106f7..b71c581 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,6 @@
 language: java
-sudo: false
 jdk:
-  - oraclejdk8
+  - openjdk8
 env:
   - phase="test" pl="" additionalprops="-Dskip.systests=true"
   - phase="verify" pl="-pl systests/protocol-tests-amqp-1-0,systests/protocol-tests-amqp-0-8,systests/protocol-tests-amqp-0-10" additionalprops="-Dskip.unittests=true"