Merge pull request #153 from telefonicaid/hardening/json_unit_test_and_parse_check

ngsi directory json check
Merge branch 'develop' into hardening/ngsi9_json_render
Merge pull request #155 from telefonicaid/hardening/ngsi9_json_render

Hardening/ngsi9 json render
Merge branch 'develop' into hardening/ngsi10_json_render
fixes for issues raised during PR review
Merge pull request #156 from telefonicaid/hardening/ngsi10_json_render

Hardening/ngsi10 json render
Merge branch 'develop' into hardening/notify_json_render
fixed blunder of HTTP Status Strings in previous PR