add IDP Mapping

[mfriesen]

1. Add IDP action
2. add GET / POST /mappings
3. add GET / DELETE / PUT /mappings/{mappingId}

Entity Mapping:
{
"mapping":
{
"attributes":
[
{
"attributeKey": "poNumber",
"sourceType": "content, metadata",
"labelText":
[
"",
""
],
"labelMatching": "fuzzy, exact",
"valiationRegex": ""
}
]
}
}