feat(REQ-4468) - 解决创建流程时，tenantId 非正常数字导致问题

workflow-engine-common/src/main/java/cn/axzo/workflow/common/model/request/bpmn/process/BpmnProcessInstanceCreateDTO.java

@@ -9,6 +9,7 @@ import lombok.AllArgsConstructor;
 import lombok.Builder;
 import lombok.Data;
 import lombok.NoArgsConstructor;
+import org.apache.commons.lang3.math.NumberUtils;
 
 import javax.validation.Valid;
 import javax.validation.constraints.NotBlank;
@@ -125,4 +126,10 @@ public class BpmnProcessInstanceCreateDTO extends BpmnProcessInstanceCreateWithF
     @ApiModelProperty(value = "签署业务，最终签署人")
     private List<BpmnTaskDelegateAssigner> signatories;
 
-}
+    public String getTenantId() {
+        if (NumberUtils.isDigits(tenantId)) {
+            return tenantId;
+        }
+        return null;
+    }
+}