GOAL:
This task covers all necessary actions, which need to be implemented in order to implement validation rules that will validate PNF csar package that utilizes Signature of individual artifacts (chapter 5.4 Signature of individual artifacts  in https://www.etsi.org/deliver/etsi_gs/NFV-SOL/001_099/004/03.03.01_60/gs_nfv-sol004v030301p.pdf).

CoS:

• SDC Onboarding is able to import csar package that utilizes Signature of individual artifacts.
• no additional validation rule for individual signature is required
• no additional validation for individual signature certificate chain is required
• Implement in SDC onboarding mechanism that will  ignore keywords Signature: and Certificate: in manifest file. Currently those keywords are not allowed and csar package with such keywords fails during onboarding.