fix(os): TDinternal CI pytest error.

tests/pytest/util/dnodes.py

@@ -460,8 +460,7 @@ class TDDnodes:
             processID = subprocess.check_output(
                 psCmd, shell=True).decode("utf-8")
 
-        binPath = os.path.dirname(os.path.realpath(__file__))
-        binPath = binPath + "/../../../debug/"
+        binPath = self.dnodes[0].getPath() + "/../../../"
         tdLog.debug("binPath %s" % (binPath))
         binPath = os.path.realpath(binPath)
         tdLog.debug("binPath real path %s" % (binPath))