Invalid command arguments: Schema

[Trudko]

Schema validations messages are leaked to cli output. For some commands it outputs pretty long and unnecessary output.

Step to reproduce

1. Run npm install -g https://github.com/blockstack/cli-blockstack#feature/stacks-2.0-tx
2. blockstack-cli make_keychain -t
3. Run command blockstack-cli get_address using wrong private key

Expected behavior
IMHO either show only default documentation with proper format description or show user friendly output - XYZ Argument Not Valid instead.

Additional info
Example of the output

blockstack-cli get_address SPECVZZAGZ4Q5TE34EMPWTV4A83A1N8MP26QBMBT
**Invalid command arguments: Schema "#/items/0/pattern" failed validation (problem: "should match pattern "^([0-9a-f]{64,66})$|^([0-9]+),([0-9a-f]{64,66},)*([0-9a-f]{64,66})$|^segwit:p2sh:([0-9]+),([0-9a-f]{64,66},)*([0-9a-f]{64,66})$|^nosign:[123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz]{1,35}$"", cause: "{"pattern":"^([0-9a-f]{64,66})$|^([0-9]+),([0-9a-f]{64,66},)*([0-9a-f]{64,66})$|^segwit:p2sh:([0-9]+),([0-9a-f]{64,66},)*([0-9a-f]{64,66})$|^nosign:[123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz]{1,35}$"}")**

Command: get_address
Usage:
  get_address PRIVATE_KEY 
  get_address --private_key PRIVATE_KEY
              
  Get the address of a private key or multisig private key bundle. Gives the 
  BTC and STACKS addresses 

  Example: 

    $ blockstack-cli get_address f5185b9ca93bdcb5753fded3b097dab8547a8b47d2be578412d0687a9a0184cb01
    {
      "BTC": "1JFhWyVPpZQjbPcXFtpGtTmU22u4fhBVmq",
      "STACKS": "SP2YM3J4KQK09V670TD6ZZ1XYNYCNGCWCVVKSDFWQ"
    }
    $ blockstack-cli get_address 1,f5185b9ca93bdcb5753fded3b097dab8547a8b47d2be578412d0687a9a0184cb01,ff2ff4f4e7f8a1979ffad4fc869def1657fd5d48fc9cf40c1924725ead60942c01
    {
      "BTC": "363pKBhc5ipDws1k5181KFf6RSxhBZ7e3p",
      "STACKS": "SMQWZ30EXVG6XEC1K4QTDP16C1CAWSK1JSWMS0QN"
    }

Use "help" to list all commands.