Add Support for Event Broker Subscriptions

[kclinden]

Add support for working with Event Broker Subscriptions.

#Get all event broker subscriptions for current user's tenant
Get-vRASubscription 

#Create new event broker subscription from JSON
New-vRASubscription -body $body

#Update event broker subscription with JSON body
Update-vRASubscription -SubscriptionId $sub -body $body

#Remove event broker subscription
Remove-vRASubscription -Subscription $sub

[jonathanmedd]

@kclinden Is this something you are planning to contribute for us?

[kclinden]

I may, but I am not sure when I will get to it. I am working with vRealize Lifecycle Manager right now, and I took the framework that you guys have for PowervRA and applied it to that. That can be found here: https://github.com/kclinden/PowervLCM