This is to facillitate ease of implementing #1406. (Tags for messages
could then be added dynamically)
Ultimately once we make the router support hiearchical routing, (#770)
we can then remove the name field and just the parse info for tags from that.
Until then, we can parse the tag name as
`fmt.Sprintf("%s %s", msg.Type(), msg.Name())`
Add a simulate only flag '--dry-run' to both CLI tx commands
and RESTful endpoints to trigger the simulation of unsigned
transactions.
* Turning --dry-run on causes the --gas flag to be ignored.
The simulation will return the estimate of the gas required
to actually run the transaction.
* Adjustment is no longer required. It now defaults to 1.0.
* In some test cases accounts retrieved from the state do not
come with a PubKey. In such cases, a fake secp256k1 key is
generated and gas consumption calculated accordingly.
Closes: #2110