Add -AsJob to Resources cmdlets and fix base cmdlets

[maddieclayton]

Description

Adds -AsJob to New-AzureRmResourceGroupDeployment and Remove-AzureRmResourceGroup (and updates tests). Also adds fix to all base cmdlets that would cause an error in logging for jobs.

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[cormacpayne]

@maddieclayton should these loggers be removed?

[maddieclayton]

done

[cormacpayne]

@maddieclayton please remove these brackets from every file where they remain

[maddieclayton]

done

[markcowl]

Instead, assign the output to a variable and pass the variable in the the job cmdlets as a positional parameter.

i.e.

$job = (Get-AzureRmResourceGroup ... | Remove-AzureRmResourceGroup -AsJob...)
Wait-Job $job
...

[markcowl]

Apply this to all the additional tests

[maddieclayton]

done

All review comments addressed

[markcowl]

on demand run here: https://azuresdkci.westus2.cloudapp.azure.com/view/PowerShell/job/powershell-demand/301/