Resolve "Extend JPA repositories by QuerydslPredicateExecutor and QuerydslBinderCustomizer"

Closes #24 (closed)

src/main/java/cz/muni/ics/kypo/training/adaptive/repository/phases/AbstractPhaseRepository.java

 package cz.muni.ics.kypo.training.adaptive.repository.phases;
 
 import cz.muni.ics.kypo.training.adaptive.domain.phase.AbstractPhase;
+import cz.muni.ics.kypo.training.adaptive.domain.phase.QuestionnairePhase;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.jpa.repository.Modifying;
 import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.querydsl.QuerydslPredicateExecutor;
 import org.springframework.data.repository.query.Param;
 import org.springframework.stereotype.Repository;
 
@@ -11,7 +13,7 @@ import java.util.List;
 import java.util.Optional;
 
 @Repository
-public interface AbstractPhaseRepository extends JpaRepository<AbstractPhase, Long> {
+public interface AbstractPhaseRepository extends JpaRepository<AbstractPhase, Long>, QuerydslPredicateExecutor<AbstractPhase> {
 
     List<AbstractPhase> findAllByTrainingDefinitionIdOrderByOrder(long trainingDefinitionId);