adding new attribute classes and converters for comma separated string and timedelta in months

[vnktshr21]

• This contribution adheres to CONTRIBUTING.md.
• I've updated CHANGELOG.md if applicable.
  • Not updating since this is an internal change
• I've added tests applicable for this pull request

What does this Pull Request accomplish?

• Added new attribute classes for
  • Comma separated string, but exposed in python API as list of strings
  • Time interval in months, but exposed in python API as hightime.timedelta
• Added new nifake attributes for these classes and unit tests validating their behavior
• Added converters for
  • list of strings to comma separated string
  • timedelta to months
    • Using the same 365/12=30.4167 conversion that was used previously
    • This is to cater to our C API returning interval values in months and us standardizing on using hightime.timedelta type for intervals in python API
• Converters for the opposite side were already implemented
• Added tests for newly added converters

List issues fixed by this Pull Request below, if any.

None

What testing has been done?

Build passes.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.10%. Comparing base (ee4860e) to head (684db26).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2151      +/-   ##
==========================================
+ Coverage   90.08%   90.10%   +0.01%     
==========================================
  Files          71       71              
  Lines       18644    18662      +18     
==========================================
+ Hits        16796    16815      +19     
+ Misses       1848     1847       -1     

Flag	Coverage Δ
codegenunittests	84.44% <ø> (ø)
nidcpowersystemtests	94.65% <ø> (+0.04%)	⬆️
nidcpowerunittests	89.53% <ø> (ø)
nidigitalsystemtests	92.26% <ø> (ø)
nidigitalunittests	68.44% <ø> (ø)
nidmmsystemtests	92.72% <ø> (ø)
nifakeunittests	85.72% <100.00%> (+0.20%)	⬆️
nifgensystemtests	94.61% <ø> (ø)
nimodinstsystemtests	73.85% <ø> (ø)
nimodinstunittests	94.20% <ø> (ø)
nirfsgsystemtests	82.43% <ø> (ø)
niscopesystemtests	92.94% <ø> (ø)
niscopeunittests	43.20% <ø> (ø)
nisesystemtests	91.50% <ø> (ø)
niswitchsystemtests	82.03% <ø> (ø)
nitclksystemtests	94.87% <ø> (ø)
nitclkunittests	98.26% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
generated/nifake/nifake/_attributes.py	96.62% <100.00%> (+0.42%)	⬆️
generated/nifake/nifake/_converters.py	95.58% <100.00%> (+0.13%)	⬆️
generated/nifake/nifake/session.py	77.68% <100.00%> (+0.18%)	⬆️

... and 1 file with indirect coverage changes

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update ee4860e...684db26. Read the comment docs.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.