Reorder commands

Author: edumco

.travis.yml

@@ -1,8 +1,16 @@
 language: java
 
+os: linux
+
 # Need to select an older Ubuntu distribution that supports JDK7
 dist: trusty
 
+jdk:
+  - openjdk7
+  - oraclejdk8
+  - openjdk8
+  - oraclejdk9
+
 # Workaround to using openjdk7 with Gradle due to security issue:
 # https://github.com/gradle/gradle/issues/2421
 before_install:
@@ -12,11 +20,5 @@ before_install:
 - sudo perl -pi.bak -e 's/^(security\.provider\.)([0-9]+)/$1.($2+1)/ge' /etc/java-7-openjdk/security/java.security
 - echo "security.provider.1=org.bouncycastle.jce.provider.BouncyCastleProvider" | sudo tee -a /etc/java-7-openjdk/security/java.security
 
-jdk:
-  - openjdk7
-  - oraclejdk8
-  - openjdk8
-  - oraclejdk9
-
 script:
   - ./gradlew clean build javadoc