Fix issue reported on #12385

[zeripath]

Fix missing setting of ConnectionString on getQueueSettings

Fix #12385

Signed-off-by: Andrew Thornton art27@cantab.net

[techknowlogick]

@GaetanJuvin

[codecov-commenter]

Codecov Report

Merging #12969 into master will increase coverage by 0.04%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master   #12969      +/-   ##
==========================================
+ Coverage   42.65%   42.70%   +0.04%     
==========================================
  Files         669      669              
  Lines       73494    73495       +1     
==========================================
+ Hits        31350    31387      +37     
+ Misses      37061    37028      -33     
+ Partials     5083     5080       -3     

Impacted Files	Coverage Δ
modules/queue/setting.go	45.67% <100.00%> (+0.67%)	⬆️
modules/indexer/stats/queue.go	64.70% <0.00%> (-11.77%)	⬇️
modules/indexer/stats/db.go	43.47% <0.00%> (-8.70%)	⬇️
models/gpg_key.go	53.33% <0.00%> (-0.58%)	⬇️
services/pull/pull.go	40.78% <0.00%> (ø)
models/issue_comment.go	53.90% <0.00%> (+0.15%)	⬆️
models/error.go	34.85% <0.00%> (+0.50%)	⬆️
services/mirror/mirror.go	19.86% <0.00%> (+1.34%)	⬆️
modules/indexer/issues/bleve.go	70.71% <0.00%> (+1.42%)	⬆️
services/gitdiff/gitdiff.go	74.48% <0.00%> (+1.63%)	⬆️
... and 6 more

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