FIX ngsi9 "polution" in pure conv ops ngs10 harness test
ADD delete entity feature
FIX ngsi9 "polution" in pure conv ops ngs10 harness test
FIX test harness due to delete entity functionality
FIX test harness due to delete entity functionality
ADD entries to CHANGES_NEXT_RELEASE
FIX issues raised during code review
Merge pull request #294 from telefonicaid/feature/entities_delete

Entities deletion