XX-11206: Expose MoH management REST API

MoH REST API
- api/moh/settings GET to retrieve all MoH settings
- api/moh/settings/{settingPath} GET, DELETE, PUT to retrieve, reset or change setting value
- api/moh/prompts GET for list of MoH prompts, POST to upload new prompt
- api/moh/prompts/{promptName} GET to download prompt based on file name, DELETE to delete prompt
- api/moh/prompts/{promptName}/stream to stream prompt