Object reference not set to an instance of an object when orchestration has no receive ports

## Description

getting error when running assess on aimtool 1.0.0, with a report location output parameter.

System.NullReferenceException: Object reference not set to an instance of an object.
at Microsoft.AzureIntegrationMigration.BizTalk.Analyze.ConversionRules.AP005OrchestrationScenarioAnalyzer.HandleReceive(WorkflowObject parentObject, Element element, Int32 elementIndex) in D:\a\aimbiztalk\aimbiztalk\src\Microsoft.AzureIntegrationMigration.BizTalk.Analyze\ConversionRules\AP005OrchestrationScenarioAnalyzer.cs:line 1154

the last successful line in the output is "AP005: Building workflow model from metamodel for orchestration" and the orchestration name of the first orchestration in this biztalk application that does NOT have any receive ports. Several orchestrations in this biztalk application are called by other orchestrations and do not have receive ports.