ADD accumulator writes PID into a file
Simplified accumulatorStop. accumulator-server kills older accumulator-server on startup
fixed two problems with output to stderr
fixed ONE MORE problem with output to stderr
All ngsi9 convop GET tested
Func tests for entity-type present in response in convops (GET)
Step: 0.16.0 -> 0.16.0-next
Merge pull request #614 from telefonicaid/bug/585_more_empty_types_in_responses

Bug/585 more empty types in responses
Issue 613 - implemented convop POST /v1/contextEntities
Made another (related but older) convop follow the rules of issue 613
CHANGES_NEXT_RELEASE
functional tests have moved from test/testharness to test/functionalTest/cases
Merge pull request #615 from telefonicaid/feature/613_POST_v1_contextEntities

Issue 613 - implemented convop POST /v1/contextEntities
Fiware-Service length 20->64
fixed unit and functional tests for Issue #613
50 -> 64 in CHANGES_NEXT_RELEASE. Clearer 64-test in http_tenant_name_error.test
Comment about AppendContextElementResponse::EntityId in CHANGES_NEXT_RELEASE
Update CHANGES_NEXT_RELEASE
Merge pull request #620 from telefonicaid/bug/613_unit_tests

fixed unit and functional tests for Issue #613
Merged with develop