VirtualHost parameter inconsistently defined

[gpduck]

The following functions have the VirtualHost parameter set to mandatory and do not provide a default value:

• Add-RabbitMQMessage
• Add-RabbitMQPermission
• Add-RabbitMQQueue
• Add-RabbitMQQueueBinding
• Copy-RabbitMQMessage
• Move-RabbitMQMessage
• Remove-RabbitMQPermission
• Set-RabbitMQPermission

The following functions have the VirtualHost parameter set to mandatory (but do provide a default value):

• Clear-RabbitMQQueue
• Remove-RabbitMQQueueBinding

I feel like optional with default value is the way to go for all of them, but wanted to get feedback before I submit a PR.

[RamblingCookieMonster]

Agreed, makes sense to me!

Looking for $defaultVirtualHost, I only see it defined in constants.ps1, which is only called in the tests. Might switch these over to hard coded '/', or setting up a module config of sorts. A variable seems difficult to discover.

[gpduck]

Isn't it called in the psm1?

I'm going to update the parameters to use the variable, and later if we add persistent settings that process will just need to update the variable.