chore: add startProcess for tmq common

tests/system-test/7-tmq/tmqCommon.py

@@ -604,6 +604,14 @@ class TMQCom:
             except Exception as err:
                 processID = ""
                 print('**** warn: ', err)
+                
+    def startProcess(self, processName, param):
+        if platform.system().lower() == 'windows':
+            cmd = f"mintty -h never %s %s > NUL 2>&1" % (processName, param)
+        else:
+            cmd = f"nohup %s %s > /dev/null 2>&1 &" % (processName, param)
+        tdLog.info("%s"%(cmd))
+        os.system(cmd)                
 
     def close(self):
         self.cursor.close()

tests/system-test/7-tmq/tmqDropConsumer.py

@@ -176,12 +176,7 @@ class TDTestCase:
         
         # use taosBenchmark to subscribe  
         binPath = self.getPath()
-        if platform.system().lower() == 'windows':
-            cmd = f"mintty -h never %s -f ./7-tmq/tmqDropConsumer.json > NUL 2>&1" % binPath
-        else:
-            cmd = f"nohup %s -f ./7-tmq/tmqDropConsumer.json > /dev/null 2>&1 & " % binPath
-        tdLog.info("%s"%(cmd))
-        os.system(cmd)
+        tmqCom.startProcess(binPath, "-f ./7-tmq/tmqDropConsumer.json")        
                 
         expectTopicNum = len(topicNameList)
         consumerThreadNum = 2

tests/system-test/7-tmq/tmqMaxGroupIds.py

@@ -176,9 +176,7 @@ class TDTestCase:
         
         # use taosBenchmark to subscribe  
         binPath = self.getPath()
-        cmd = "nohup %s -f ./7-tmq/tmqMaxGroupIds.json > /dev/null 2>&1 & " % binPath
-        tdLog.info("%s"%(cmd))
-        os.system(cmd)
+        tmqCom.startProcess(binPath, "-f ./7-tmq/tmqMaxGroupIds.json")
                 
         expectTopicNum = 1
         expectConsumerNUm = 99