[BESU-179] getSignerMetrics doesn't return missing signers

[matkt]

Signed-off-by: Karim TAAM karim.t2am@gmail.com

PR description

getSignerMetrics doesn't return missing signers (validators who never proposed a block are not displayed). This means to find missing signers you have to use getSigners followed by getSignerMetrics and manually figure out which ones are missing.

Fixed Issue(s)

getSignerMetrics returns now missing signers

Example with 0x12eb759f2222d7711c63729a45c3585731521d02

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": [
    {
      "address": "0x6639adb0e64884dc4cd9d686c15ba1ca1885c24e",
      "proposedBlockCount": "0x22",
      "lastProposedBlockNumber": "0xb8"
    },
    {
      "address": "0x12eb759f2222d7711c63729a45c3585731521d02",
      "proposedBlockCount": "0x0",
      "lastProposedBlockNumber": "0x0"
    },
    {
      "address": "0x187ec8a86cdd7e71e2c0e72affe48b727f894877",
      "proposedBlockCount": "0x21",
      "lastProposedBlockNumber": "0xb7"
    },
    {
      "address": "0x9cd90ee9290637030073f2b32884b9fa1fc0c06b",
      "proposedBlockCount": "0x21",
      "lastProposedBlockNumber": "0xb6"
    }
  ]
}

[AbdelStark]

Looks good to me.