Update travis with Spring5 build

Author: jgrandja

.travis.yml

@@ -12,5 +12,5 @@ install: ./mvnw -U install --quiet -DskipTests=true -P bootstrap
 script:
   - jdk_switcher use openjdk7
   - ./mvnw clean test -P bootstrap
-#  - jdk_switcher use oraclejdk8
-#  - ./mvnw -U clean test -P spring5
+  - jdk_switcher use oraclejdk8
+  - ./mvnw -f spring-security-oauth2 -U clean test -P spring5