Currenly, Larva read and write steps use filenames, like:

step1.java.queuename.write = scenario01/in.xml
step2.java.queuename.read = scenario01/out.xml

where the files contain the request message and the expected response, for instance:
scenario01/in.xml:

<request query="select count(*) from table"/>

scenario02/out.xml:

<response>23</response>

In case the files contain a single line only (like in the example above), then using this PR, this can also be written like:

step1.java.queuename.writeline = <request query="select count(*) from table"/>
step2.java.queuename.readline = <response>23</response>

N.B. the 'readline' functionality has been disabled for now, as it does not prevent the 'saveResults' feature from writing unwanted files.