T16: Extend ActionSelector to support ActionProfile

[tatry]

closes #16 PTF tests: https://github.com/tatry/p4c/pull/16

Example outputs:

• Add member:

  {
  "ingress_ap": {
      "added_member_ref": 1
  }
  }

• Get all members:

  {
  "ingress_ap": {
      "member_refs": {
          "1": {
              "action_id": 1,
              "action_name": "ingress_a1",
              "action_parameters": [
                  {
                      "name": "param",
                      "value": "0x1"
                  }
              ]
          },
          "3": {
              "action_id": 1,
              "action_name": "ingress_a1",
              "action_parameters": [
                  {
                      "name": "param",
                      "value": "0x3"
                  }
              ]
          },
          "2": {
              "action_id": 1,
              "action_name": "ingress_a1",
              "action_parameters": [
                  {
                      "name": "param",
                      "value": "0x2"
                  }
              ]
          },
          "4": {
              "action_id": 1,
              "action_name": "ingress_a1",
              "action_parameters": [
                  {
                      "name": "param",
                      "value": "0x4"
                  }
              ]
          }
      }
  }
  }

• Get single member:

  {
  "ingress_ap": {
      "member_refs": {
          "1": {
              "action_id": 1,
              "action_name": "ingress_a1",
              "action_parameters": [
                  {
                      "name": "param",
                      "value": "0x1"
                  }
              ]
          }
      }
  }
  }

[osinstom]

Feel free to merge