Update Cosmos DB SDK to 06-01-preview (#15220)

* generated files + session records for tests

* Revert tests to 06-01

* Revert tests to 06-01

* Fix for failing long running operations (#14663)

Co-authored-by: Meha Kaushik <mekaushi@microsoft.com>

* change db

* change version

* update metadata

* Make suggested changes and rerun tests

* added create update role assignment validation

* more changes to tests

* Remove wrong db account from test

* Update Release note

Co-authored-by: Meha Kaushik <kaushik.meha@gmail.com>
Co-authored-by: Meha Kaushik <mekaushi@microsoft.com>

eng/mgmt/mgmtmetadata/cosmos-db_resource-manager.txt

@@ -3,12 +3,12 @@ AutoRest installed successfully.
 Commencing code generation
 Generating CSharp code
 Executing AutoRest command
-cmd.exe /c autorest.cmd https://github.com/Azure/azure-rest-api-specs/blob/master/specification/cosmos-db/resource-manager/readme.md --csharp --version=v2 --reflect-api-versions --csharp-sdks-folder=D:\azure-sdk-for-net2\sdk
-2020-08-12 00:38:38 UTC
+cmd.exe /c autorest.cmd https://github.com/Azure/azure-rest-api-specs/blob/master/specification/cosmos-db/resource-manager/readme.md --csharp --version=v2 --reflect-api-versions --csharp-sdks-folder=C:\Users\kristynh\azure-sdk-for-net\sdk
+2020-09-23 07:35:20 UTC
 Azure-rest-api-specs repository information
 GitHub fork: Azure
 Branch:      master
-Commit:      5dae0ac8c8911eb47fca5730bfe4d5e2e68562a3
+Commit:      4e0c86991df0089597a58cf92823d57c2efa9d36
 AutoRest information
 Requested version: v2
 Bootstrapper version:    autorest@2.0.4413

sdk/cosmosdb/Microsoft.Azure.Management.CosmosDB/AzSdk.RP.props

@@ -1,7 +1,7 @@
 <Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <!--This file and it's contents are updated at build time moving or editing might result in build failure. Take due deligence while editing this file-->
   <PropertyGroup>
-    <AzureApiTag>CosmosDB_2020-04-01</AzureApiTag>
+    <AzureApiTag>CosmosDB_2020-06-01-preview</AzureApiTag>
     <PackageTags>$(PackageTags);$(CommonTags);$(AzureApiTag);</PackageTags>
   </PropertyGroup>
 </Project>