get operation parameters via the official inventory way

[jmazzitelli]

Inventory has an "official" way of storing operation parameters within operation types - a child of the operation type which is a data entity whose structural data is named "parameterTypes"

The Ruby client needs to get operation parameters using this mechanism, rather than the ad-hoc way we were doing it (via general properties).

The WildFly agent is creating both (the "official" way and the general props way) for backward compatibility, but storing these in general props is deprecated and will go away, see JIRA HWKAGENT-130

The new way will have inventory show you the params like this:

URL (notice "/d;parameterTypes"): http://127.0.0.1:8080/hawkular/inventory/entity/f;feed_id/rt;WildFly%20Server/ot;Shutdown/d;parameterTypes

{
  "path": "/t;hawkular/f;feed_id/rt;WildFly%20Server/ot;Shutdown/d;parameterTypes",
  "name": "parameterTypes",
  "identityHash": "1ad5d5963d6978975e958de5abcb49f778695f",
  "contentHash": "5ff8951bc6a6ab6483f69ec0ab139d5a76e22c",
  "syncHash": "27163827304a2c50e31b9ce2ee74e5e32f396d58",
  "value": {
    "timeout": {
      "type": "int",
      "description": "Timeout in seconds to allow active connections to drain",
      "defaultValue": "0",
      "required": false
    },
    "restart": {
      "type": "bool",
      "description": "Should the server be restarted after shutdown?",
      "defaultValue": "false",
      "required": false
    }
  }
}