Changes for Enforcer commands

[tillery-aporeto]

This changes is part of innovation week and allows the Enforcer to receive and respond to a commands from apoctl. It works like oam ping and oam netstat This implementation is more generic and allows for additional commands to be added by the Enforcer at a later time.

[tillery-aporeto]

/build - automatically fired by gogo with following PRs and commit SHAs v1.0.0

[
  {
    "project": "",
    "component": "enforcerd",
    "pr-id": "2715",
    "commit-sha": "61b74ef07474b4bb5a7bbd1cc0718542a7ba0ac5",
    "pipeline": "master"
  },
  {
    "project": "",
    "component": "gaia",
    "pr-id": "783",
    "commit-sha": "f599ba19288ddeb920557bfd5ba52cf5589e2362",
    "pipeline": "master"
  }
]

[tillery-aporeto]

/build - automatically fired by gogo with following PRs and commit SHAs v1.0.0

[
  {
    "project": "",
    "component": "enforcerd",
    "pr-id": "2715",
    "commit-sha": "00780dab1e3e221276f5b321c4838b2363466b81",
    "pipeline": "master"
  },
  {
    "project": "",
    "component": "gaia",
    "pr-id": "783",
    "commit-sha": "f599ba19288ddeb920557bfd5ba52cf5589e2362",
    "pipeline": "master"
  }
]