Create 'Serialize JSON' Service

[davidwabnitz]

Service description

Note: might be merged with #59

• name: Write JSON
• description: Serializes JSON formatted content payload and extracts data based on JSONPath to a desired JSON structure as string.
• type: action
• provider name: JSON Service Provider
• step config options:
  • ...
• output

Further requirements

• testing the step configuration
  • preconditions
  • test success criteria

[johipsum]

We decided to merge this with the parseJSON service