Add configuration for Git user using jenkins CLI.

I think we'll want to start using the Jenkins CLI for managed
configuration of plugins. It's the recommended config management
solution for multiple plugins and if I can figure out how to use the
Jenkins puppet module to run Groovy script files rather than inline
scripts we'll be even better off.

This change resolves #148

modules/profile/manifests/jenkins/master.pp

@@ -8,6 +8,18 @@
 
   ### Jenkins Plugins
 
+  # config for gitscm
+  jenkins::cli::exec { 'configure_git_user':
+    # semicolons are needed because the lines are joined with spaces rather than newlines.
+    command => [
+      'def gitscm_config = Jenkins.getInstance().getDescriptor("hudson.plugins.git.GitSCM");',
+      'gitscm_config.setCreateAccountBasedOnEmail(false);',
+      'gitscm_config.setGlobalConfigName("jenkins");',
+      'gitscm_config.setGlobalConfigEmail("[email protected]");',
+      'gitscm_config.save();',
+    ]
+  }
+
   # config for audit-trail
   file { '/var/lib/jenkins/audit-trail.xml':
     mode => '0640',