Replace /etc/hosts steps in install_sge.sh with hostname and hosts addons

Author: dan-blanchard

.travis.yml

@@ -8,7 +8,15 @@ python:
   - 3.6
   - 3.6-dev
 
-sudo: true
+sudo: required
+
+addons:
+  hostname: drmaa.travis-ci.org
+  hosts:
+    - localhost
+    - localhost.localdomain
+    - drmaa.travis-ci.org
+
 
 notifications:
   email: false

travis/install_sge.sh

@@ -5,7 +5,6 @@
 # Written by Dan Blanchard (dblanchard@ets.org), September 2013
 
 cd travis
-sudo sed -i -r "s/^(127.0.0.1\s)(localhost\.localdomain\slocalhost)/\1localhost localhost.localdomain $(hostname) /" /etc/hosts
 sudo apt-get update -qq
 echo "gridengine-master shared/gridenginemaster string localhost" | sudo debconf-set-selections
 echo "gridengine-master shared/gridenginecell string default" | sudo debconf-set-selections