Null pointer exception while creating file reporter

[ppgravitee]

Zendesk issue: 5170

NullPointerException is thrown while creating file reporter.

Steps to produce:

Select {{Security->Audit Log}}

Create a file reporter and save.

Should receive the following error:

{noformat}15:28:24.696 [reactor-tcp-nio-3] [] ERROR i.g.a.p.h.a.c.ProviderPluginManager - An unexpected error occurs while loading
java.lang.NullPointerException: Cannot invoke "org.springframework.context.ApplicationContext.getAutowireCapableBeanFactory()" because "this.applicationContext" is null
at io.gravitee.am.reporter.file.audit.FileAuditReporter.doStart(FileAuditReporter.java:193){noformat}