set settings to default if parameters in JSON are not found

[nitin710]

Description

If JSON file does not exist, or parameters in JSON not found, use default parameters

• It should cover
  • emotibitCommSetting.json
  • parsedDataFormat.json

Tests

• ✔️ if the parsedOutputformat fails to parse
• ✔️ is emotibitCommSettings fails to parse
• ✔️ is json files have missing information

[nitin710]

Tested: if unicast = true is missing, by default set to false

if broadcast is missing, by default set to true