fix (接口测试): 修复请求头中包含多余参数

--bug=1008180 --user=赵勇 【github #7881】HTTP请求默认添加了"content-type":"text/plain; charset=UTF-8"的请求头 https://www.tapd.cn/55049933/s/1071783

backend/src/main/java/io/metersphere/api/dto/definition/request/sampler/MsHTTPSamplerProxy.java

@@ -237,7 +237,10 @@ public class MsHTTPSamplerProxy extends MsTestElement {
                 sampler.setDoMultipart(true);
             }
             if (CollectionUtils.isNotEmpty(bodyParams)) {
-                sampler.setArguments(httpArguments(bodyParams));
+                Arguments arguments = httpArguments(bodyParams);
+                if (arguments != null && !arguments.getArguments().isEmpty()) {
+                    sampler.setArguments(arguments);
+                }
             }
         }
 

backend/src/main/java/io/metersphere/api/dto/scenario/Body.java

@@ -71,6 +71,7 @@ public class Body {
                 sampler.setDoMultipart(true);
             }
         } else {
+            if(StringUtils.isNotEmpty(this.getRaw()) || this.getJsonSchema()!= null ) {
                 parseJonBodyMock();
                 KeyValue keyValue = new KeyValue("", "JSON-SCHEMA", this.getRaw(), true, true);
                 sampler.setPostBodyRaw(true);
@@ -78,6 +79,7 @@ public class Body {
                 keyValue.setUrlEncode(false);
                 body.add(keyValue);
             }
+        }
         return body;
     }