Replace deprecated tf.contrib.metrics.streaming_accuracy with tf.metrics.accuracy (#18154)

* Replace deprecated tf.contrib.metrics.streaming_accuracy with tf.metrics.accuracy

As tf.contrib.metrics.streaming_accuracy (tf.contrib.metrics.streaming_mean_squared_error) has been deprecated and
has been replaced with tf.metrics.accuracy, this fix
replaces deprecated tf.contrib.metrics.streaming_accuracy with tf.metrics.accuracy
in tensorflow/contrib/training/python/training/evaluation.py.

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

* Replace streaming_accuracy with tf.metrics.accuracy in tests

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

* Fix additional WARNING in evaluation_test.py

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

* Fix pylint issue

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>