Fix exception thrown when Debug is called for Service modules.

[georgend]

Show full request body and response when Debug is called.

[peombwa]

"The stream was already consumed.." exception is still thrown when calling commands that make POST calls such as Test-MgDirectoryObjectProperty:

[peombwa]

We should also honor $DebugPreference that is set by a customer.
Setting $DebugPreference to continue only prints out a limited number of debug messages. See repro steps below :

[peombwa]

It would be nice to add Pester tests for some of these edge cases. e.g.

$ps = [powershell]::Create()
$ps.AddScript(@'
$DebugPreference = 'Continue'

Import-Module .\src\Authentication\Authentication\artifacts\Microsoft.Graph.Authentication.psd1
Import-Module .\src\DirectoryObjects\DirectoryObjects\Microsoft.Graph.DirectoryObjects.psd1

Connect-MgGraph
Test-MgDirectoryObjectProperty -DisplayName "New Name" -EntityType "Group" 
'@).Invoke()

# Assert that debug stream contains the expected debug log and no exception.
if ($ps.Streams.Debug -notLike "*Exception*") { pass test ... }
if ($ps.Streams.Debug -like "*HTTP/1.1 200 OK*) { pass test ...}
....

[peombwa]

We should also honor $DebugPreference that is set by a customer.
Setting $DebugPreference to continue only prints out a limited number of debug messages. See repro steps below :

Is there a way for us to honor $DebugPreference? Without it, customers running cmdlets in scripts won't be able to bypass the confirm dialog.

[georgend]

@peombwa This seems to be part of a known issue, especially since there is nothing special we are doing that would disregard the customer preference. Also from the code, however, removing this check:-

msgraph-sdk-powershell/tools/Custom/Module.cs

Line 59 in 5b5b2fe

if (invocationInfo.BoundParameters.ContainsKey("Debug"))

resolves the issue, ensuring the cmdlets respect all the preferences.