Mlperf requests (#201)

* added au metric to the configuration file; set shuffling and shuffle buffer size to be 2 for cosmoflow

* removed dependencies on dlioprofiler

* fixed bugs

* fixed issue with dlio_profiler

* bring back dlio_profiler_py

dlio_benchmark/utils/utility.py

@@ -36,14 +36,22 @@
 try:
     from dlio_profiler.logger import dlio_logger as PerfTrace, fn_interceptor as Profile, DLIO_PROFILER_ENABLE
 except:
-    class Profile:
+    class Profile(object):
         def __init__(self, name=None, cat=None):
             self.type = type
         def log(self, func):
             return func
+        def log_init(self, func):
+            return func
         def iter(self, a):
             return a
-    class dlio_logger:
+        def __enter__(self):
+            return
+        def __exit__(self, type, value, traceback):
+            return
+        def update(self, *, epoch=0, step=0, size=0, default=None):
+            return
+    class dlio_logger(object):
         def __init__(self,):
             self.type = None
         def initialize_log(self, logfile=None, data_dir=None, process_id=-1):