Hardcoding of mersi2 l1b reader valid_range for channel 24 and 25 as these are wrong in the HDF data

[TAlonglong]

Add harcoding of mersi2 l1b reader valid_range for channel 24(10.8) and 25(12.0) as these have wrong values in the HDF data

[mraspaud]

Thanks for the quick PR. I'm wondering if we should be proactive and check the version of the file format (if there is such info in the file ?) also, so that it'll be forward compatible too ?

[TAlonglong]

I can't see any version information. What the PR do is that it check the current known invalid value and corrects this.

When the format is updated the valid_range value is not altered.

[djhoese]

If this wasn't something you needed right away, I'd say we should just wait. Since we don't know when the fix will be released I'm ok with what you have. You do have unnecessary parentheses and should have a space after the if. Does flake8 allow this?

[TAlonglong]

flake8 did not complain at least. But I removed the parentheses and fixed the space.

[djhoese]

@mraspaud @TAlonglong What do we think on this? Turns out I need this and it doesn't look like a fix is coming soon (or at least there wasn't any kind of indication) as I had hoped.

FYI merged with master this should pass tests again.

[mraspaud]

LGTM