do not use enum for objectis, doe not help and impact performance

opcua/object_ids.py

@@ -2,7 +2,7 @@
 
 from enum import IntEnum
 
-class ObjectIds(IntEnum):
+class ObjectIds(object):
     Boolean = 1
     SByte = 2
     Byte = 3

schemas/generate_ids.py

@@ -5,7 +5,7 @@ if __name__ == "__main__":
     outputfile.write("\n")
     outputfile.write("from enum import IntEnum\n")
     outputfile.write("\n")
-    outputfile.write("class ObjectIds(IntEnum):\n")
+    outputfile.write("class ObjectIds(object):\n")
     for line in inputfile:
         name, nb, datatype = line.split(",")
         outputfile.write("    {} = {}\n".format(name, nb))