Add identity to Terminate call (#1894)

Author: Quinn-With-Two-Ns

temporal-sdk/src/main/java/io/temporal/internal/client/RootWorkflowClientInvoker.java

@@ -484,6 +484,7 @@ public TerminateOutput terminate(TerminateInput input) {
     TerminateWorkflowExecutionRequest.Builder request =
         TerminateWorkflowExecutionRequest.newBuilder()
             .setNamespace(clientOptions.getNamespace())
+            .setIdentity(clientOptions.getIdentity())
             .setWorkflowExecution(input.getWorkflowExecution());
     if (input.getReason() != null) {
       request.setReason(input.getReason());