Support -Tenant parameter on Connect-PowerBIServiceAccount when using the UserParameterSet and UserAndCredentialPasswordParameterSet

I'm creating some PBI data-tenants that are managed by B2B admins. We'd like these admins to be able to run the PBI PowerShell commands but the Connect-PowerBIServiceAccount doesn't allow specifying the -Tenant parameter for the 'User' parameter set.

This prevents B2B guest admins from being able to administer the PBI tenant, like create workspaces, etc.

Command:

Connect-PowerBIServiceAccount -TenantId 'ad347600-0000-0000-0000-000000000000'

Give the following error:

Connect-PowerBIServiceAccount : Parameter set cannot be resolved using the specified named parameters.
At line:1 char:1
+ Connect-PowerBIServiceAccount -TenantId 'ad347600-0000-0000-0000-0000 ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidArgument: (:) [Connect-PowerBIServiceAccount], ParameterBindingException
    + FullyQualifiedErrorId : AmbiguousParameterSet,Microsoft.PowerBI.Commands.Profile.ConnectPowerBIServiceAccount

I'm running version 1.0.840 of the MicrosoftPowerBIMgmt module.

The original PR that added the -Tenant parameter was: https://github.com/microsoft/powerbi-powershell/pull/42/files

Start by inspecting the Connect-PowerBIServiceAccount parameter definitions and the files changed by the linked original PR that added -Tenant. Reproduce the command with the User and UserAndCredentialPasswordParameterSet cases. Done means -TenantId is accepted without an ambiguous parameter-set error for those user authentication modes.