title: gradle task not recognizing the sonar-project.properties file in project workspace
body: <p>I have created a sample spring boot project along with sonarqube gradle plugin in it .I have add all the needed properties like login token to sonar-project.properties.But while running gradle task I get exception of authentication</p>
  
  <p>Gradle plugin added</p>
  
  <p><code>plugins {  id "org.sonarqube" version "2.6"    }</code></p>
  
  <p><a href="https://i.stack.imgur.com/9pOnH.png" rel="nofollow noreferrer">Screenshot of project structure</a></p>