ADLA Catalog Updates and ADLS crash fix

[begoldsm]

Description

• add support for ADLA catalog package get and list
• Add support for listing the following catalog items from deeper ancestors:
  • Table
  • TVF
  • View
  • Statistics.
• Fixed a bug that was causing powershell to crash sometimes during import of lots of small files to ADLS.

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[cormacpayne]

@begoldsm was this an issue that was stemming from the SDK?

[begoldsm]

@cormacpayne yes, and it was fixed in the SDK and an update was needed to the SDK package here. There was a null reference exception that was not being properly handled in the SDK that was getting thrown all the way out and ultimately causing PowerShell process to crash.

[cormacpayne]

On-demand: http://azuresdkci.cloudapp.net/view/1-AzurePowerShell/job/powershell-demand/1489/