Add schema for simple payment fraud analytics

[Chaffelson]

The following schema is useful for simple payment fraud analysis, and used in this blog. It would be good to have it as a general option in Mockingbird.

{
 "timestamp": {
   "type": "mockingbird.timestampNow"
 },
 "transaction_id": {
   "type": "finance.routingNumber"
 },
 "user_id": {
   "type": "mockingbird.pick",
   "params": [
     {
       "values": ["Mike", "John", "Jane", "Mary", "Bob", "Alice", "Joe", "Sue", "Ryan", "Jill", "Bill","Jen", "Jack", "Jill", "Tom", "Tim", "Tina", "Terry", "Troy", "Tara", "Tanya", "Trevor", "Tucker","Trent", "Trenton", "Mario"]
     }
   ]
 },
 "amount": {
   "type": "finance.amount"
 },
 "ip_address": {
   "type": "internet.ip"
 },
 "browser": {
   "type": "mockingbird.pickWeighted",
   "params": [
     {
       "values": ["Chrome", "Brave", "Firefox", "Safari"],
       "weights": [65, 3, 8, 20]
     }
   ]
 },
 "location": {
   "type": "mockingbird.pickWeighted",
   "params": [
     {
       "values": [ "USA", "Spain", "UK", "Australia", "Mexico", "China", "Japan", "Canada"],
       "weights": [65, 20, 8, 1, 3, 1, 1, 1]
     }
   ]
 },
 "is_declined": {
   "type": "mockingbird.pickWeighted",
   "params": [
     {
       "values": [true, false],
       "weights": [3, 98]
     }
   ]
 },
 "fraud_flag": {
   "type": "mockingbird.pick",
   "params": [
     {
       "values": [false]
     }
   ]
 }
}