sonarqube test coverage with istanbul : No coverage property. Skip Sensor

I'm trying to output some test coverage (lcov) reports from istanbul into sonarqube to analyse our test coverage using thoughtworks GO. There is a coverage/html folder being output but sonarqube reports the following error No coverage property. Skip Sensor. Here's my properties file, what am I missing ?

`sonar.projectKey=transformers.allspark.ui
sonar.projectName=Transformers Allspark UI
sonar.projectVersion=1.0
sonar.host.url=http://ift.tt/2na4Ri8
sonar.sources=.
sonar.projectBaseDir=.
sonar.language=js
sonar.sourceEncoding=UTF-8
sonar.javascript.lcov.reportPath=coverage/html

`