Fix missing x_request_id data

**Phenomenon and reproduction steps**

**Root cause and solution**

**Impactions**

**Test method**

**Affected branch(es)**

* main

**Checklist**

- [ ] Dependencies update required
- [ ] Common bug (similar problem in other repo)

Author: xiaochaoren1

app/app.yaml

@@ -20,7 +20,7 @@ app:
     timeout: 60
 
   spec:
-    l7_tracing_limit: 100
+    l7_tracing_limit: 1000
     network_delay_us: 1000000
     allow_multiple_trace_ids_in_tracing_result: false
     call_apm_api_to_supplement_trace: false

app/app/application/l7_flow_tracing.py

@@ -429,7 +429,7 @@ async def trace_l7_flow(self,
                      dataframe_flowmetas['x_request_id_1'][index]))
             new_x_request_metas -= x_request_metas
             x_request_metas |= new_x_request_metas
-            x_requests = [L7XrequestMeta(nxr) for nxr in new_x_request_metas]
+            xrequests = [L7XrequestMeta(nxr) for nxr in new_x_request_metas]
             # x_request_id related query
             x_request_filters = []
             if x_request_id_0s:

app/app/application/tracing_completion.py

@@ -269,7 +269,7 @@ async def trace_l7_flow(self,
                      dataframe_flowmetas['x_request_id_1'][index]))
             new_x_request_metas -= x_request_metas
             x_request_metas |= new_x_request_metas
-            x_requests = [L7XrequestMeta(nxr) for nxr in new_x_request_metas]
+            xrequests = [L7XrequestMeta(nxr) for nxr in new_x_request_metas]
             # x_request_id related query
             x_request_filters = []
             if x_request_id_0s: