Avoid Get-Location hardcode in AnalysisServices.Test

[minghan]

Description

1. Avoid Get-Location hardcode in AnalysisServices.Test. We add a new method which calls Get-Location from the common code. Fix for bug AnalysisServices.Tests must not use hard coded location #3157
2. Comment out the provisioningState assertion for Suspend Analysis Servicesserver test case when server is paused. There is a service side RP change coming in December that will break this test case, hence fixing and then commenting that particular line out. We will uncomment this line at a future date. (Bug Set-AzureRmResource "hangs" when updating tags on paused AnalysisServices #4107)

Checklist

• I have read the Submitting Changes section of CONTRIBUTING.md
• The title of the PR is clear and informative
• The appropriate change log has been updated
• The PR does not introduce breaking changes
• If applicable, the changes made in the PR have proper test coverage
• For public API changes to cmdlets:
  • the changes have gone through a cmdlet design review (Microsoft internal partners only)
  • the cmdlet markdown files were generated using the platyPS module