title: Sonarqube scanner report upload error 500
body: <p>When every I create a new project with SonarQube project properties, I get this error:</p>
  
  <pre><code>04:13:57.939 DEBUG: Upload report
  04:14:11.533 DEBUG: POST 500 sonarserverurl/api/ce/submit?projectKey=Somename&amp;projectName=Somename | time=13580ms
  04:14:11.540 INFO: ------------------------------------------------------------------------
  04:14:11.540 INFO: EXECUTION FAILURE
  04:14:11.540 INFO: ------------------------------------------------------------------------
  04:14:11.540 INFO: Total time: 2:25.443s
  04:14:11.639 INFO: Final Memory: 56M/647M
  04:14:11.639 INFO: ------------------------------------------------------------------------
  04:14:11.639 ERROR: Error during SonarQube Scanner execution
  org.sonarqube.ws.client.HttpException: Error 500 on sonarserver:9000/api/ce/submit?projectKey=Some name&amp;projectName=Some name* : {"errors":[{"msg":"An error has occurred. Please contact your administrator"}]}
          at org.sonarqube.ws.client.BaseResponse.failIfNotSuccessful(BaseResponse.java:36)
          at org.sonar.scanner.bootstrap.ScannerWsClient.failIfUnauthorized(ScannerWsClient.java:106)
          at org.sonar.scanner.bootstrap.ScannerWsClient.call(ScannerWsClient.java:75)
          at org.sonar.scanner.report.ReportPublisher.upload(ReportPublisher.java:177)
          at org.sonar.scanner.report.ReportPublisher.execute(ReportPublisher.java:131)
          at org.sonar.scanner.phases.PublishPhaseExecutor.publishReportJob(PublishPhaseExecutor.java:71)
          at org.sonar.scanner.phases.PublishPhaseExecutor.executeOnRoot(PublishPhaseExecutor.java:53)
          at org.sonar.scanner.phases.AbstractPhaseExecutor.execute(AbstractPhaseExecutor.java:79)
          at org.sonar.scanner.scan.ModuleScanContainer.doAfterStart(ModuleScanContainer.java:175)
          at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:143)
          at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:128)
          at org.sonar.scanner.scan.ProjectScanContainer.scan(ProjectScanContainer.java:262)
          at org.sonar.scanner.scan.ProjectScanContainer.scanRecursively(ProjectScanContainer.java:257)
          at org.sonar.scanner.scan.ProjectScanContainer.doAfterStart(ProjectScanContainer.java:247)
          at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:143)
          at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:128)
          at org.sonar.scanner.task.ScanTask.execute(ScanTask.java:47)
          at org.sonar.scanner.task.TaskContainer.doAfterStart(TaskContainer.java:86)
          at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:143)
          at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:128)
          at org.sonar.scanner.bootstrap.GlobalContainer.executeTask(GlobalContainer.java:118)
          at org.sonar.batch.bootstrapper.Batch.executeTask(Batch.java:117)
          at org.sonarsource.scanner.api.internal.batch.BatchIsolatedLauncher.execute(BatchIsolatedLauncher.java:63)
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
          at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
          at java.lang.reflect.Method.invoke(Method.java:498)
          at org.sonarsource.scanner.api.internal.IsolatedLauncherProxy.invoke(IsolatedLauncherProxy.java:60)
          at com.sun.proxy.$Proxy0.execute(Unknown Source)
          at org.sonarsource.scanner.api.EmbeddedScanner.doExecute(EmbeddedScanner.java:233)
          at org.sonarsource.scanner.api.EmbeddedScanner.runAnalysis(EmbeddedScanner.java:151)
          at org.sonarsource.scanner.cli.Main.runAnalysis(Main.java:123)
          at org.sonarsource.scanner.cli.Main.execute(Main.java:77)
          at org.sonarsource.scanner.cli.Main.main(Main.java:61)
  04:14:11.640 DEBUG: Execution getVersion
  04:14:11.640 DEBUG: Execution stop
  </code></pre>
  
  <p>My sonar-project.properties file is:</p>
  
  <pre><code>sonar.host.url=http : // sonarqube_server:9000
  sonar.projectKey=sonar.org:projectname
  sonar.projectName=WP_projectname
  sonar.projectVersion=1.0
  sonar.exclusions=bower_components/**,public_html/bower_components/**
  sonar.sources=.
  </code></pre>