When batchmode was used, the templates could not be used to
expand dynrestpath. We are now storing the restpath param
within the batch data if we are in batch mode.
- testbench: Added tests for omhttp dynrestpath param
Testing setting the restpath by template - one with batch mode
and one without batch mode
- When we are in batch mode, and the restpath value changes, the
batch is submitted and reinitialized
closes: https://github.com/rsyslog/rsyslog/issues/4567
