Update .travis.yml

Author: pgleeson

.travis.yml

@@ -1,7 +1,7 @@
 language: java
 
 before_install:
-- sed -i.bak -e 's|https://nexus.codehaus.org/snapshots/|https://oss.sonatype.org/content/repositories/codehaus-snapshots/|g' ~/.m2/settings.xml
+  - sed -i.bak -e 's|https://nexus.codehaus.org/snapshots/|https://oss.sonatype.org/content/repositories/codehaus-snapshots/|g' ~/.m2/settings.xml
 
 jdk:
   - openjdk7