making AvroSchemaGenerator immune to empty argument
Removing usage of working_dir from Java workflow node.
#1133 dropping useless workfing_dir creation for java nodes
#919 renaming DocumentToResearchInitiative to DocumentToConceptId and DocumentToResearchInitiatives to DocumentToConceptIds
Handling single quote in namespace definition
Removing datastore_tools.py script since it has been moved to Github
Pretty printing of JSON dump
Pretty printing JSON representation of Avro records in case of error in TestingConsumer