[dbapi2] fix unknown refs

[marscher]

fixes #1241

[codecov]

Codecov Report

❌ Patch coverage is 83.33333% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 86.48%. Comparing base (f82ca24) to head (cf64f9b).

Files with missing lines	Patch %	Lines
jpype/dbapi2.py	83.33%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1342      +/-   ##
==========================================
- Coverage   86.48%   86.48%   -0.01%     
==========================================
  Files         113      113              
  Lines       10513    10512       -1     
  Branches     4029     4029              
==========================================
- Hits         9092     9091       -1     
  Misses        822      822              
  Partials      599      599              

Files with missing lines	Coverage Δ
jpype/dbapi2.py	94.34% <83.33%> (-0.01%)	⬇️

🚀 New features to boost your workflow:

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

[marscher]

❌ Patch coverage is 83.33333% with 1 line in your changes missing coverage.

yeah, that's why it slipped our test suite in the first place. That code path was causing an exception.