D-Net

merging trunk changes with IIS-CDH-5.3.0 branch

#1247 renaming inputEntityId to inputObjectId because not all objects are entities (e.g. metadataextraction input)

#1247 renaming id field to more descriptive inputEntityId

#1247 introducing third draft of Fault avro schema: adding missing stracktrace

#1247 introducing second draft of Fault avro schema: refactoring recursive causes to array of causes

#1247 introducing first draft of Fault avro schema

dependencies cleanup: removing protocol buffer dependency from schemas, only avro should be supported

dependencies cleanup: removing protocol buffer dependency from schemas, only avro should be supported

creating IIS-CDH-5.3.0 branch

introducing branches folder