Confirmations value in block is NaN

[ManuGowda]

Expected behavior

confirmations value should be valid and an integer and also the

Actual behavior

There are two issues here one is undefined value MONITOR: undefined
and another is confirmations value is undefined

MONITOR: undefined -> chain:blocks:change { id: '10705954266938328476',
      version: 1,
      timestamp: 94239710,
      height: 8305141,
      previousBlock: '9592550440812684133',
      numberOfTransactions: 0,
      totalAmount: 0,
      totalFee: 0,
      reward: 300000000,
      payloadLength: 0,
      payloadHash:
       'e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855',
      generatorPublicKey:
       'a6b504812068c9a1186034966868118e1d98e88bc60835a81252f51136c3cddd',
      generatorId: '11027108891413363651L',
      blockSignature:
       'fccdec62363f37456174362d6857075209ea9bc2d1d50d30d6fff59771ac9c84cb86f3b032e0ac3bc9f26c67d47480a75019f712b1ff5834371eb794fb94d70f',
      confirmations: NaN,
      totalForged: '300000000',
      transactions: [] }

Steps to reproduce

Sync 2.0.0-alpha.9 node with testnet

Which version(s) does this affect? (Environment, OS, etc...)

2.0.0

[pablitovicente]

For the undefined issue we have a different report in #3545 will work it in there