implement diff.py

[maxxbw54]

Compare two versions of dataset and return what are the changed data points.

Tasks

• Add diff checker script for the SEEDPoisoner Component.
• Provide sample input data for the diffchecker_poisoner script
• Add diff checker script for the SEEDConsistencyChecker Component.
• Provide sample input data for the diffchecker_consistencychecker script.

[nitesh31mishra]

SEEDConsistencyChecker data diff script commit - 6207bd5