title: SonarQube can't find the project configuration path
body: <p>Anyone knows how to figure this out?</p>
  
  <pre><code>C:\sonar-runner\bin\..
  SonarQube Runner 2.3
  Java 1.7.0_45 Oracle Corporation (64-bit)
  Windows Server 2012 6.2 amd64
  INFO: Error stacktraces are turned on.
  INFO: Runner configuration file: C:\sonar-runner\bin\..\conf\sonar-runner.properties
  INFO: Project configuration file: NONE
  INFO: Default locale: "pt_BR", source code encoding: "windows-1252" (analysis is platform dependent)
  INFO: Work directory: C:\sonar-runner\bin\.sonar
  INFO: SonarQube Server 4.0
  INFO: ------------------------------------------------------------------------
  INFO: EXECUTION FAILURE
  INFO: ------------------------------------------------------------------------
  Total time: 7.425s
  Final Memory: 6M/31M
  INFO: -----
  ERROR: Error during Sonar runner execution
  ERROR: Unable to execute Sonar
  ERROR: Caused by: You must define the following mandatory properties for 'Unknow
  n': sonar.projectKey, sonar.projectName, sonar.projectVersion, sonar.sources
  </code></pre>
  
  <p>For some reason the SonarQube can't find the configuration project path
  its return NONE from the INFO.
  I already have the file in the conf path of the sonar-runner.</p>