jcli: Add a way to get fragment_id from a posted fragment

[dkijania]

Is your feature request related to a problem/context ? Please describe if applicable.
If we build a transaction with some id. and successfully send it to node (via jcli message post command). There is no way to correlate it to fragment id that is available with command (jcli message logs).

Example:

tx_id of posted transaction: 991a2739bdfb2a823041e9ae35f1bb18029bcc94bb36abcedbb9ea0b65586d57

Fragment:

  last_updated_at: "2019-06-12T09:24:14.011399600Z"
  received_at: "2019-06-12T09:24:13.741416700Z"
  received_from: Rest
  status:
    InABlock: "61463.14"

Describe the solution you'd like
Either fragment has a field: source_tx_id or jcli will return fragment_id after we use message post command

[NicolasDP]

This has been addressed now. The fragment ID is displayed and there is no longer distinction between fragment ID and transaction ID