Feature: Added instrument paramater snapshot_exclude

[nyxus]

Changes proposed in this pull request:

• Added a parameter to the instrument parameter to exclude it from the snapshot.

Note that this is very similar to #1651, the goal is the same but it has a different implementation. To see the reason why we need this please look at #1651 which has a detailed problem description. This implementation was suggested by @jenshnielsen, which uses the instrument parameter to store the snapshot_exclude instead of providing a list to the snapshot function.

@jenshnielsen, @AdriaanRol

[nyxus]

Note that I still need to add tests.

[codecov]

Codecov Report

Merging #1653 into master will increase coverage by <.01%.
The diff coverage is 85.71%.

@@            Coverage Diff             @@
##           master    #1653      +/-   ##
==========================================
+ Coverage   67.07%   67.08%   +<.01%     
==========================================
  Files         144      144              
  Lines       17679    17686       +7     
==========================================
+ Hits        11858    11864       +6     
- Misses       5821     5822       +1

[nyxus]

I've added tests and also tested the new implementation on a device on my desk. Can someone review and merge the code? @jenshnielsen, @WilliamHPNielsen?

[jenshnielsen]

Looks good, I left a few comments inline. In addition it seems like some of the lines are more than 80 char l Could you check this

[nyxus]

I've adapted the code after review and fixed the line length issues.

[jenshnielsen]

Looks good. I will leave this for a bit to givee others a chance to merge