cubicweb-medicalexp #2823726 schema: rename ScoreDef -> ScoreDefinition [done]

Most coding style guides suggest avoiding abbreviations.

prioritynormal
typebug
done in0.2.0
load1.000
load left0.000
closed by#afd906a95eb5 [schema] Rename ScoreDef in ScoreDefinition, closes #2823726
patch[schema] Rename ScoreDef in ScoreDefinition, closes #2823726 [applied]