add functions to read instrument info from DL1 file

[vuillaut]

Necessary as long there is no DL1 event source

[codecov]

Codecov Report

Merging #468 into lstchain_ctapipe0.8 will decrease coverage by 0.23%.
The diff coverage is 20.89%.

@@                   Coverage Diff                   @@
##           lstchain_ctapipe0.8     #468      +/-   ##
=======================================================
- Coverage                41.71%   41.47%   -0.24%     
=======================================================
  Files                       76       76              
  Lines                     6207     6273      +66     
=======================================================
+ Hits                      2589     2602      +13     
- Misses                    3618     3671      +53     

Impacted Files	Coverage Δ
lstchain/io/io.py	70.48% <20.89%> (-11.85%)	⬇️

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[vuillaut]

I have absolutely no idea why the test is failing on something completely unrelated and that is working fine otherwise: CameraDisplay(geom, image)
astropy version ?

[rlopezcoto]

I have absolutely no idea why the test is failing on something completely unrelated and that is working fine otherwise: CameraDisplay(geom, image) astropy version ?

I'm getting those tests pass in my local version of this PR, are they also passing in your computer?

[vuillaut]

I have absolutely no idea why the test is failing on something completely unrelated and that is working fine otherwise: CameraDisplay(geom, image) astropy version ?

I'm getting those tests pass in my local version of this PR, are they also passing in your computer?

yes they are.
It must be an install problem but it does not seem to replicate on other PRs... 🙄

[rlopezcoto]

then, let's move on...