Adding SubscriptionID,Certificate and other properties for backward compatibility into the cmdlet.
Also added subscription resolver that uses current Azure profile.
Adding the Get-AzureHDInsightProperties cmdlet to get a subscription's properties for the HDInsight resource type.
Adding Get-AzureHDInsightProperties cmdlet and unit tests.
Adding the Remove-AzureHDInsightCluster cmdlet and its unit tests.
Adding Data objects required for all Azure HDInsight cmdlets.
Adding Add-AzureHDInsightConfigValues cmdlet and unit tests
Removing warnings while running HDInsight unit tests.