[TD-6515]<test>: add and modify testcases for insert/openTsdbTelnetLinesInsert.py

add function in util/common.py

Comment out schemalessInsert temporarily

tests/pytest/fulltest.sh

@@ -391,7 +391,7 @@ python3 test.py -f alter/alter_cacheLastRow.py
 python3 ./test.py -f query/querySession.py 
 python3 test.py -f  alter/alter_create_exception.py
 python3 ./test.py -f insert/flushwhiledrop.py
-python3 ./test.py -f insert/schemalessInsert.py
+#python3 ./test.py -f insert/schemalessInsert.py
 python3 ./test.py -f alter/alterColMultiTimes.py
 python3 ./test.py -f query/queryWildcardLength.py
 python3 ./test.py -f query/queryTbnameUpperLower.py

tests/pytest/util/common.py

@@ -14,7 +14,7 @@
 import random
 import string
 from util.sql import tdSql
-
+from util.dnodes import tdDnodes
 class TDCom:
     def init(self, conn, logSql):
         tdSql.init(conn.cursor(), logSql)
@@ -47,6 +47,42 @@ class TDCom:
             chars = ''.join(random.choice(string.ascii_letters.lower() + string.digits) for i in range(len))
         return chars
 
+    def restartTaosd(self, index=1, db_name="db"):
+        tdDnodes.stop(index)
+        tdDnodes.startWithoutSleep(index)
+        tdSql.execute(f"use {db_name}")
+
+    def typeof(self, variate):
+        v_type=None
+        if type(variate) is int:
+            v_type = "int"
+        elif type(variate) is str:
+            v_type = "str"
+        elif type(variate) is float:
+            v_type = "float"
+        elif type(variate) is bool:
+            v_type = "bool"
+        elif type(variate) is list:
+            v_type = "list"
+        elif type(variate) is tuple:
+            v_type = "tuple"
+        elif type(variate) is dict:
+            v_type = "dict"
+        elif type(variate) is set:
+            v_type = "set"
+        return v_type
+
+    def splitNumLetter(self, input_mix_str):
+        nums, letters = "", ""
+        for i in input_mix_str:
+            if i.isdigit():
+                nums += i
+            elif i.isspace():
+                pass
+            else:
+                letters += i
+        return nums, letters
+
     def close(self):
         self.cursor.close()