heap inspection issue fix

Author: gaubansa

cybersource-rest-client-netstandard/cybersource-rest-client-netstandard/Client/ApiClient.cs

@@ -458,6 +458,7 @@ public object CallApi(
                 string fileName = Path.Combine(clientCertDirectory, clientCertFile);
                 // Importing Certificates
                 var certificate = new X509Certificate2(fileName, clientCertPassword);
+                clientCertPassword=string.Empty;
                 RestClient.Options.ClientCertificates = new X509CertificateCollection { certificate };
             }
 

cybersource-rest-client-netstandard/cybersource-rest-client-netstandard/generator/cybersource-csharp-template/ApiClient.mustache

@@ -500,6 +500,7 @@ namespace {{packageName}}.Client
                 string fileName = Path.Combine(clientCertDirectory, clientCertFile);
                 // Importing Certificates
                 var certificate = new X509Certificate2(fileName, clientCertPassword);
+                clientCertPassword=string.Empty;
                 RestClient.Options.ClientCertificates = new X509CertificateCollection { certificate };
             }