Ledger view - enable search on Ledger system metadata

[aluccaroni]

Right now we are only able to search for Ledger additional metadata (such as broker-id and component/application). We need to be able to search inside the Ledger metadata, such as "Sate: CLOSED", "DigestType: CRC32C" and so on

Here an example of Ledger data:

Ledger 151356465
Age: 890 hours
Created at: Thu Mar 26 2020 17:44:13 GMT+0100 (Central European Standard Time)
State: CLOSED
Ensemble size: 2 (number of bookies)
WriteQuorumSize: 2 (number of copies)
AckQuorumSize: 2
Size: 256.17 MB
LastEntryId: 2665046
Password: dodo
DigestType: CRC32C
Closed: true
MetadataFormatVersion: 3

We need to be able to search for multiple information and also for ledger that do NOT contain a specific information.

For example:
"CLOSED",!"CRC32C"
Should search for all the ledger that contains "CLOSED" but do NOT contains "CRC32C".

We also need to be able to search for entry containing spaces, for example:
"State: CLOSED"