Make tests compatible with graph mode

[WindQAQ]

1. Do TODO : make tests compatible with graph mode in distort_image_ops.
2. Revert Fix distort_image_ops_test #257.
3. Have to use self.evaluate() to make exception raised in C++.

[kyleabeauchamp]

I think this all LGTM. The only question I have is whether we need to do anything more along the lines of to #260 / #290

[WindQAQ]

Hi Kyle, initial codes migrated from contrib have only dynamic shape checking (check in graph building time). When decorating with tf.function, they randomly failed the CI testing (I don't know the reason...). As suggested in #260 (comment), doing static shape checking and dynamic shape checking seem to be the most robust and most correct way (see #260 (comment) for more details).

[facaiy]

Hi, Tzu-Wei, what will happen without self.evaluate?

[WindQAQ]

Hi, Facai, without self.evaluate, the test will fail in graph mode because the OpError is not raised.

[Squadrick]

@WindQAQ Looks good, let's get this merged.