Modify Samples to Call Function App and Web App Samples via Default Hostname #227

Job	Run time
Build Test Matrix	6s
Test: function-app-storage-http/dotnet/scripts	3m 57s
Test: web-app-managed-identity/python/scripts	4m 53s
Test: web-app-cosmosdb-mongodb-api/python/scripts	4m 51s
Test: function-app-service-bus/dotnet/scripts	6m 46s
Test: web-app-sql-database/python/scripts	3m 41s
	24m 14s

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