fix travis-ci hosts

Author: egulias

.travis.yml

@@ -3,7 +3,8 @@ 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
+  - sed -e "s/^\\(127\\.0\\.0\\.1.*\\)/\\1 $(hostname | cut -c1-63)/" /etc/hosts > /tmp/hosts
+  - sudo mv /tmp/hosts /etc/hosts
   - cat /etc/hosts # optionally check the content *after*
 
 env: