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#### Description
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-->

cmis.get_error_description is very slow for passive module:

```
>>> begin = time.time()
>>> s.get_error_description()
'ModuleLowPwr'
>>> print(time.time() - begin)
2.905252695083618
```

For a module that has flat memory, it does not need check data path state. Because of this issue, `show error-status --fetch-from-hardware` takes very long time if there are many passive modules present:

```
real    1m12.116s
user    0m5.852s
sys     0m15.491s
```

After the fix, it changes to:

```
real    0m1.051s
user    0m0.499s
sys     0m0.059s
```

#### Motivation and Context
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     Why is this change required? What problem does it solve?
     If this pull request closes/resolves an open Issue, make sure you
     include the text "fixes #xxxx", "closes #xxxx" or "resolves #xxxx" here
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Optimize cmis.get_error_description for passive module

#### How Has This Been Tested?
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     Include details of your testing environment, and the tests you ran to
     see how your change affects other areas of the code, etc.
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Manual test
Unit test

#### Additional Information (Optional)