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