Fix Issue 4069

* Updated Cmdlet New-AzureRmApiManagementApi to create Api with Empty
Path #4069

Author: solankisamir

src/ResourceManager/ApiManagement/Commands.ApiManagement.ServiceManagement/ApiManagementClient.cs

@@ -456,7 +456,7 @@ public void ApiImportFromFile(
             string apiId,
             PsApiManagementApiFormat specificationFormat,
             string specificationPath,
-            string urlSuffix,
+            string apiPath,
             string wsdlServiceName,
             string wsdlEndpointName,
             PsApiManagementApiType? apiType)
@@ -467,7 +467,7 @@ public void ApiImportFromFile(
 
             using (var fileStream = File.OpenRead(specificationPath))
             {
-                Client.Apis.Import(context.ResourceGroupName, context.ServiceName, apiId, contentType, fileStream, urlSuffix, wsdlServiceName, wsdlEndpointName, apiTypeValue);
+                Client.Apis.Import(context.ResourceGroupName, context.ServiceName, apiId, contentType, fileStream, apiPath, wsdlServiceName, wsdlEndpointName, apiTypeValue);
             }
         }
 

src/ResourceManager/ApiManagement/Commands.ApiManagement.ServiceManagement/Commands/NewAzureApiManagementApi.cs

@@ -61,8 +61,8 @@ public class NewAzureApiManagementApi : AzureApiManagementCmdletBase
             ValueFromPipelineByPropertyName = true,
             Mandatory = true,
             HelpMessage = "Web API Path. Last part of the API's public URL. This URL will be used by API consumers for sending requests to the web service." +
-                          " Must be 1 to 400 characters long. This parameter is required.")]
-        [ValidateNotNullOrEmpty]
+                          " Must be 0 to 400 characters long. This parameter is required.")]
+        [ValidateNotNull]
         public String Path { get; set; }
 
         [Parameter(