Fix output directory mix-ups when DataAnalysis output files

[rmmilewi]

It appears that data analyses like GambitCommitAuthorshipInferenceAnalysis output their generated files to the top level directory where Reposcanner is being called, rather than the specified output directory. This happens even when we explicitly direct Reposcanner to output the analysis results in the output directory like so

output = factory.createAnnotatedCSVData("{outputDirectory}/gambitAuthorIdentities.csv".format(
outputDirectory=request.getOutputDirectory()))

It's possible that we're failing to set the output directory correctly when generating requests to pass to DataAnalysis instances.