Benchmark test for rrelu fails on windows

[seanpmorgan]

Benchmark op fails for a median_delta of 0 in windows testing. Marking it as a SkipTest until resolved.

File "\\?\C:\Users\RUNNER~1\AppData\Local\Temp\Bazel.runfiles_e847arzc\runfiles\__main__\tensorflow_addons\activations\rrelu_test.py", line 88, in benchmarkRreluOp
    self.run_op_benchmark(sess, result.op, min_iters=25)
  File "C:\hostedtoolcache\windows\Python\3.7.5\x64\lib\site-packages\tensorflow_core\python\platform\benchmark.py", line 389, in run_op_benchmark
    "throughput": mbs / median_delta
ZeroDivisionError: float division by zero

[seanpmorgan]

Looking more closely is this necessary? I didn't think adding it would hurt / hoped to expand bench-marking, but seems it may be more of a pain

[chazuttu]

Seems like time.time() may be causing the problem
timeit.default_timer() probably will fix the problem

[bhack]

There Is already an upstream issue at tensorflow/tensorflow#35884