DATAJPA-641 - Adapt Travis configuration to run in new infrastructure.

Original pull request: #125.

.travis.yml

@@ -1,6 +1,8 @@
 language: java
+
 jdk:
   - oraclejdk8
+
 env:
   matrix:
     - PROFILE=ci
@@ -9,8 +11,13 @@ env:
     - PROFILE=hibernate-41
     - PROFILE=hibernate-42
     - PROFILE=hibernate-43
+
+sudo: false
+
 cache:
   directories:
     - $HOME/.m2
+
 install: true
-script: "mvn clean dependency:list test -P${PROFILE} -Dsort"
+
+script: "mvn clean dependency:list test -P${PROFILE} -Dsort"