This ticket will address a variety of items discovered during use of the intial version of preload generation:

• Ensure all values flow to preaload env templates (ex: availability zone templates are not)
• Ensure SDC Model Identifiers are documented in VNF API format (ex: vnf-type, etc.)
• Ensure CSAR is used in VNF and GR API where appropriate and available
• Flag populated preload templates with _incomplete when they are not fully resolved
• If a value is still set to CHANGEME in the preload env, then revert to the original VALUE FOR from the blank preload template
• Ensure app_tests/preload_tests/sample_heat passes all vvp validations