Need inventory for users to check PLACEHOLDERS in define.json

[sherry-chou]

Currently in define.json, those that needs user customization is now indicated as "PLACEHOLDER", such as the following. We need a tool to extract this from define.json and output as inventory for users.:
{
"OID": "IT.VS.VSPOS",
"mandatory": false,
"name": "VSPOS",
"description": "Vital Signs Position of Subject",
"role": "Record Qualifier",
"dataType": "text",
"length": null,
"origin": {
"type": "PLACEHOLDER",
"source": "PLACEHOLDER"
},
"codeList": "CL.POSITION"
}