pib_cli.cli.commands.bases.fixtures

Command test fixtures.

`pib_cli.cli.commands.bases.fixtures.command_harness`	CLI CommandBase test harness.
`pib_cli.cli.commands.bases.fixtures.command_harness_config`	CLI CommandConfigBase test harness.
`pib_cli.cli.commands.bases.fixtures.command_harness_exceptions`	CLI CommandBase test harness with exception handling.