198 bug referenceprovider stopped working

[leon1995]

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have updated the changelog accordingly.
• I have added tests to cover my changes.

[leon1995]

further linting will be done in #156 and moving files to pat directory in #131

[codecov]

Codecov Report

Merging #199 (fcdf127) into master (14ff758) will decrease coverage by 0.04%.
The diff coverage is 100.00%.

❗ Current head fcdf127 differs from pull request most recent head 862bc18. Consider uploading reports for the commit 862bc18 to get more accurate results

@@            Coverage Diff             @@
##           master     #199      +/-   ##
==========================================
- Coverage   86.92%   86.89%   -0.04%     
==========================================
  Files         113      113              
  Lines       13366    13367       +1     
==========================================
- Hits        11619    11615       -4     
- Misses       1747     1752       +5     

Impacted Files	Coverage Δ
src/sdc11073/certloader.py	0.00% <ø> (ø)
src/sdc11073/mdib/descriptorcontainers.py	96.25% <100.00%> (ø)
src/sdc11073/mdib/statecontainers.py	95.75% <100.00%> (ø)
src/sdc11073/mdib/transactions.py	84.30% <100.00%> (ø)
src/sdc11073/provider/__init__.py	100.00% <100.00%> (ø)
src/sdc11073/provider/components.py	98.30% <100.00%> (ø)
src/sdc11073/provider/providerimpl.py	92.40% <100.00%> (ø)

... and 4 files with indirect coverage changes