Tests for checkstyle publisher

Should be straightforward, the publisher checkstyle simply lacked tests.
Also make use of literal include for the examples.

Change-Id: I000cdee47bb0938af9f327bcaba06b87f8287739
Allow 'Build on the same node' in trigger-builds builder

In `trigger-builds` builder, create the
'<hudson.plugins.parameterizedtrigger.NodeParameters/>'
element if 'same-node' parameter is set to 'true'.

This adds the configurability of the 'Build on the same node'
parameter.

Change-Id: I3b6fa0a50b74932ad9837c7b88835b8b0c9c23ec
Merge "Tests for checkstyle publisher"
Merge "Allow 'Build on the same node' in trigger-builds builder"
add ability to parse from a file object

Change-Id: I4f62fad4d2c0e361eddaed6d4db2faa655bd4b11
Merge "add ability to parse from a file object"
Create the output_dir for the test subcommand.

This change creates the output directory for the test subcommand if it
does not yet exist. If it exists, use it. Any other exceptions are
re-raised.

Change-Id: I487c69e70f9b6c475691ca4fef4669a0c318ab55