Solution for ZMQ connectivity of the Bitcoin nodes

We have 7 active sons on the mainnet and the HIVE / HBD deposits are working fine. However the Bitcoin deposit address creation is failing due to possible issues with the ZMQ node. The same error is seen in IRONA TESTNET as well. (@sivayavvari has further details, logs etc).

We need to provide a method to the SON operators and end users to identify the health of the Bitcoin node and also for end users. This can be perhaps achieved by adding queries / handshakes to the ZMQ node or using third party tools if any.

The first step must be providing this additional tool or instructions and as the second step we must explore ways to use additional Bitcoin nodes from a pool of nodes.

Deliverables: cli_wallet commands, other instructions required to inspect the health of the ZMQ node. The same must be possible via UI too. ie, we must provide PeerplaysJS and Python Support eventfully.