[v2] When using both groupBy and orderBy, results aren't ordered

[aaj3f]

Description

This v2 bug fix is being prioritized because it affects a client under contract

When using groupBy results are obviously grouped according to the binding provided to groupBy. Within those grouped results, if using orderBy the results themselves are not currently being ordered

{
  "select": ["?user", "?username", "?type"],
  "where": [
    ["?user", "_user/username", "?username"],
    ["?user", "_user/type", "?type"]
  ],
  "opts": {
      "groupBy": "?type",
      "orderBy": "?username"
  }
}

// =>

{
  "dog": [
    [
      87960930223086,
      "zeta",
      "dog"
    ],
    [
      87960930223084,
      "delta",
      "dog"
    ],
    [
      87960930223082,
      "beta",
      "dog"
    ]
  ],
  "person": [
    [
      87960930223085,
      "epsilon",
      "person"
    ],
    [
      87960930223083,
      "gamma",
      "person"
    ],
    [
      87960930223081,
      "alpha",
      "person"
    ]
  ]
}

[cap10morgan]

Fixed by #484 & fluree/ledger#208