Add Travis workaround based on both hostname and /etc/hosts

See travis-ci/travis-ci#5227.

Author: toddobryan-amazon

.travis.yml

@@ -1,5 +1,11 @@
 language: scala
 
+before_install:
+  - cat /etc/hosts # optionally check the content *before*
+  - sudo hostname "$(hostname | cut -c1-63)"
+  - sed -e "s/^\\(127\\.0\\.0\\.1.*\\)/\\1 $(hostname | cut -c1-63)/" /etc/hosts | sudo tee /etc/hosts
+  - cat /etc/hosts # optionally check the content *after*
+
 env:
   global:
     - PUBLISH_JDK=openjdk6