Backport PR #25517: TST: xfail non-writeable pytables tests with numpy 1.16x
# [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/25518?src=pr&el=h1) Report
> Merging [#25518](https://codecov.io/gh/pandas-dev/pandas/pull/25518?src=pr&el=desc) into [0.24.x](https://codecov.io/gh/pandas-dev/pandas/commit/37da2c100fd09cbe8f98c78c642a978c3fae98c9?src=pr&el=desc) will **decrease** coverage by `<.01%`.
> The diff coverage is `100%`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/25518/graphs/tree.svg?width=650&token=eZ4WkYLtcO&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/25518?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           0.24.x   #25518      +/-   ##
==========================================
- Coverage   92.39%   92.39%   -0.01%     
==========================================
  Files         166      166              
  Lines       52419    52421       +2     
==========================================
- Hits        48435    48434       -1     
- Misses       3984     3987       +3
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `90.83% <100%> (ø)` | :arrow_up: |
| #single | `42.91% <100%> (-0.01%)` | :arrow_down: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/25518?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/compat/numpy/\_\_init\_\_.py](https://codecov.io/gh/pandas-dev/pandas/pull/25518/diff?src=pr&el=tree#diff-cGFuZGFzL2NvbXBhdC9udW1weS9fX2luaXRfXy5weQ==) | `93.33% <100%> (+0.47%)` | :arrow_up: |
| [pandas/util/testing.py](https://codecov.io/gh/pandas-dev/pandas/pull/25518/diff?src=pr&el=tree#diff-cGFuZGFzL3V0aWwvdGVzdGluZy5weQ==) | `88.04% <0%> (-0.1%)` | :arrow_down: |
| [pandas/io/pytables.py](https://codecov.io/gh/pandas-dev/pandas/pull/25518/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL3B5dGFibGVzLnB5) | `92.23% <0%> (-0.09%)` | :arrow_down: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/25518?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/25518?src=pr&el=footer). Last update [37da2c1...2615b58](https://codecov.io/gh/pandas-dev/pandas/pull/25518?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 # [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/25518?src=pr&el=h1) Report
> Merging [#25518](https://codecov.io/gh/pandas-dev/pandas/pull/25518?src=pr&el=desc) into [0.24.x](https://codecov.io/gh/pandas-dev/pandas/commit/37da2c100fd09cbe8f98c78c642a978c3fae98c9?src=pr&el=desc) will **decrease** coverage by `<.01%`.
> The diff coverage is `100%`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/25518/graphs/tree.svg?width=650&token=eZ4WkYLtcO&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/25518?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           0.24.x   #25518      +/-   ##
==========================================
- Coverage   92.39%   92.39%   -0.01%     
==========================================
  Files         166      166              
  Lines       52419    52421       +2     
==========================================
- Hits        48435    48434       -1     
- Misses       3984     3987       +3
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `90.83% <100%> (ø)` | :arrow_up: |
| #single | `42.91% <100%> (-0.01%)` | :arrow_down: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/25518?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/compat/numpy/\_\_init\_\_.py](https://codecov.io/gh/pandas-dev/pandas/pull/25518/diff?src=pr&el=tree#diff-cGFuZGFzL2NvbXBhdC9udW1weS9fX2luaXRfXy5weQ==) | `93.33% <100%> (+0.47%)` | :arrow_up: |
| [pandas/util/testing.py](https://codecov.io/gh/pandas-dev/pandas/pull/25518/diff?src=pr&el=tree#diff-cGFuZGFzL3V0aWwvdGVzdGluZy5weQ==) | `88.04% <0%> (-0.1%)` | :arrow_down: |
| [pandas/io/pytables.py](https://codecov.io/gh/pandas-dev/pandas/pull/25518/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL3B5dGFibGVzLnB5) | `92.23% <0%> (-0.09%)` | :arrow_down: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/25518?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/25518?src=pr&el=footer). Last update [37da2c1...2615b58](https://codecov.io/gh/pandas-dev/pandas/pull/25518?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
