Merge branch '31362_decrease_cyclomatic_complexity_threshold_step2' into 'master'

Decrease Metrics/CyclomaticComplexity threshold to 15

See merge request !13905

.rubocop.yml

@@ -643,7 +643,7 @@ Metrics/ClassLength:
 # of test cases needed to validate a method.
 Metrics/CyclomaticComplexity:
   Enabled: true
-  Max: 16
+  Max: 15
 
 # Limit lines to 80 characters.
 Metrics/LineLength: