Closes#48724. Update `.editorconfig` to make the Java settings the default
for all files, and then apply a 2-space indent to all `*.gradle` files.
Then reformat all the files.
Enable audit logs in docker by creating console appenders for audit loggers.
also rename field @timestamp to timestamp and add field `type` with value audit
The docker build contains now two log4j configuration for oss or default versions. The build now allows override the default configuration.
Also changed the format of a timestamp from ISO8601 to include time zone as per this discussion https://github.com/elastic/elasticsearch/pull/36833#discussion_r244225243closes#42666
Jason Tedor
Rory Hunter
Przemyslaw Gomulka