@normalize broken for >=v1.2.0 when using @facets

[dkjii-g]

Description

@facets used to work when being normalized, but v1.2.0 introduced some nesting behavior, which gives a weird result when using @normalize with @facets

What version of Dgraph are you using?

v1.2.0

Have you tried reproducing the issue with the latest release?

Yes

What is the hardware spec (RAM, OS)?

4G, Linux

Steps to reproduce the issue (command/config used to run Dgraph).

Go to https://dgraph.io/docs/query-language/#facets-on-scalar-predicates
Try this query:

curl -H "Content-Type: application/graphql+-" localhost:8080/query -XPOST -d '
{
   data(func: eq(name, "Alice")) @normalize {
     name: name
     friend @facets(close) {
       nameTo: name
     }
   }
}' | python -m json.tool | less

in the facets playground
Result:

{
  "data": {
    "data": [
      {
        "0": true,
        "1": false,
        "2": true,
        "name": "Alice",
        "nameTo": "Bob"
      },
      {
        "0": true,
        "1": false,
        "2": true,
        "name": "Alice",
        "nameTo": "Charlie"
      },
      {
        "0": true,
        "1": false,
        "2": true,
        "name": "Alice",
        "nameTo": "Dave"
      }
    ]
  }
}

Expected behaviour and actual result.

This is what used to happen on v1.1.1:

{
  "data": {
    "data": [
      {
       "friend|close": true,
        "name": "Alice",
        "nameTo": "Bob"
      },
      {
       "friend|close": false,
        "name": "Alice",
        "nameTo": "Charlie"
      },
      {
       "friend|close": true,
        "name": "Alice",
        "nameTo": "Dave"
      }
    ]
  }
}

[MichelDiz]

@ashish-goswami this is related to #4907