title: Sonar, what is java target
body: <p>I get the following erro when running sonar:</p>
  
  <pre><code>[11:32:40]: [:sonarTask] 11:32:40.862 [QUIET] [system.out] INFO: EXECUTION FAILURE
  [11:32:40]: [:sonarTask] 11:32:40.862 [QUIET] [system.out] INFO: ------------------------------------------------------------------------
  [11:32:40]: [:sonarTask] 11:32:40.862 [QUIET] [system.out] Total time: 1.031s
  [11:32:40]: [:sonarTask] 11:32:40.956 [QUIET] [system.out] Final Memory: 1M/15M
  [11:32:40]: [:sonarTask] 11:32:40.956 [QUIET] [system.out] INFO: ------------------------------------------------------------------------
  [11:32:40]: [:sonarTask] 11:32:40.956 [ERROR] [system.err] ERROR: Error during Sonar runner execution
  [11:32:40]: [:sonarTask] 11:32:40.956 [ERROR] [system.err] ERROR: Unable to execute Sonar
  [11:32:40]: [:sonarTask] 11:32:40.956 [ERROR] [system.err] ERROR: Caused by: The plugin python is not supported with Java 1.6.0_21
  [11:32:40]: [:sonarTask] 11:32:40.956 [ERROR] [system.err] ERROR: Caused by: org/sonar/plugins/python/PythonPlugin : Unsupported major.minor version 51.0
  [11:32:40]: [:sonarTask] 11:32:40.956 [ERROR] [system.err] ERROR: 
  [11:32:40]: [:sonarTask] 11:32:40.956 [ERROR] [system.err] ERROR: To see the full stack trace of the errors, re-run SonarQube Runner with the -e switch.
  [11:32:40]: [:sonarTask] 11:32:40.956 [ERROR] [system.err] ERROR: Re-run SonarQube Runner using the -X switch to enable full debug logging.
  [11:32:41]: [:sonarTask] 11:32:41.096 [DEBUG] [org.gradle.process.internal.DefaultExecHandle] Changing state to: FAILED
  </code></pre>
  
  <p>It has failed because java 1.6 is not compatible with the python plugin, but I need to keep this.
  My java source is 1.6 and it has to be this.</p>
  
  <p>In my sonar properties I have the following:</p>
  
  <pre><code>sonar.java.source=1.6
  sonar.java.target=1.6
  </code></pre>
  
  <p>What changes will I have to make? Change java target to 1.7? Is java target the java version used when running sonar? </p>