Fix Travis build. Closes #39.
Fix Travis build. Closes #39.

Change-Id: I1c02c7396016d11d1ba0b26a9db2949476444249

TouK/sputnik,mihn/sputnik,alien11689/sputnik,zdanek/sputnik,damianszczepanik/sputnik,julien-sobczak/maven-sonar-codereview-plugin,TouK/sputnik,TouK/sputnik,mirkosertic/sputnik,zdanek/sputnik,damianszczepanik/sputnik,mihn/sputnik,TouK/sputnik,julien-sobczak/maven-sonar-codereview-plugin,alien11689/sputnik,platan/sputnik,alien11689/sputnik,zdanek/sputnik,platan/sputnik,mihn/sputnik,mirkosertic/sputnik,platan/sputnik,TouK/sputnik,julien-sobczak/maven-sonar-codereview-plugin,zdanek/sputnik,mirkosertic/sputnik,mirkosertic/sputnik,zdanek/sputnik,alien11689/sputnik,platan/sputnik,alien11689/sputnik,alien11689/sputnik,platan/sputnik,damianszczepanik/sputnik