Exception is thrown when posting a build info without module notification

[drautureau]

If a module notification is not built, posting a buildinfo notification fails with the following stack trace:

SEVERE: [GRAPES] Failed to get build Module buildInfo 
java.io.IOException: [GRAPES] Failed to get report.
    at org.axway.grapes.jenkins.GrapesPlugin.getModule(GrapesPlugin.java:135)
    at org.axway.grapes.jenkins.notifications.buildinfo.BuildInfoNotification$BuildInfoNotificationDescriptorImpl.createAutoInstance(BuildInfoNotification.java:84)
    at org.axway.grapes.jenkins.GrapesNotifier.getAllNotifications(GrapesNotifier.java:190)
    at org.axway.grapes.jenkins.GrapesNotifier.perform(GrapesNotifier.java:144)
    at hudson.tasks.BuildStepMonitor$2.perform(BuildStepMonitor.java:32)
    at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:781)
    at hudson.model.AbstractBuild$AbstractBuildExecution.performAllBuildSteps(AbstractBuild.java:753)
    at hudson.maven.MavenModuleSetBuild$MavenModuleSetBuildExecution.post2(MavenModuleSetBuild.java:1020)
    at hudson.model.AbstractBuild$AbstractBuildExecution.post(AbstractBuild.java:706)
    at hudson.model.Run.execute(Run.java:1690)
    at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:509)
    at hudson.model.ResourceController.execute(ResourceController.java:88)
    at hudson.model.Executor.run(Executor.java:246)