MINIFI-469 - support OSX in travis automated builds

This closes #135.

Signed-off-by: Aldrin Piri <aldrin@apache.org>
diff --git a/.travis.yml b/.travis.yml
index 811a4c2..e5aba1a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,17 +1,19 @@
 language: java
 
-os:
-  - linux
+matrix:
+  include:
+    - os: linux
+      jdk: oraclejdk8
+      # before_install aids in a couple workarounds for issues within the Travis-CI environment
+      #   1. Workaround for buffer overflow issues with OpenJDK versions of java as per https://github.com/travis-ci/travis-ci/issues/5227#issuecomment-165135711
+      #   2. Workaround for non-existent Maven repository as per: https://github.com/travis-ci/travis-ci/issues/4629#issuecomment-131214465
+      before_install:
+        - sudo hostname "$(hostname | cut -c1-63)"
+        - sed -e "s/^\\(127\\.0\\.0\\.1.*\\)/\\1 $(hostname | cut -c1-63)/" /etc/hosts | sudo tee /etc/hosts
+        - sed -i.bak -e 's|https://nexus.codehaus.org/snapshots/|https://oss.sonatype.org/content/repositories/codehaus-snapshots/|g' ~/.m2/settings.xml
+    - os: osx
+      osx_image: xcode9.2
 
-jdk:
-  - oraclejdk8
 
-# before_install aids in a couple workarounds for issues within the Travis-CI environment
-#   1. Workaround for buffer overflow issues with OpenJDK versions of java as per https://github.com/travis-ci/travis-ci/issues/5227#issuecomment-165135711
-#   2. Workaround for non-existent Maven repository as per: https://github.com/travis-ci/travis-ci/issues/4629#issuecomment-131214465
-before_install:
-  - sudo hostname "$(hostname | cut -c1-63)"
-  - sed -e "s/^\\(127\\.0\\.0\\.1.*\\)/\\1 $(hostname | cut -c1-63)/" /etc/hosts | sudo tee /etc/hosts
-  - sed -i.bak -e 's|https://nexus.codehaus.org/snapshots/|https://oss.sonatype.org/content/repositories/codehaus-snapshots/|g' ~/.m2/settings.xml
 
 script: mvn clean install -Pcontrib-check