added transactional annotations, finally closes mitreid-connect#926 addresses mitreid-connect#862

Author: jricher

openid-connect-server/src/main/java/org/mitre/oauth2/repository/impl/JpaOAuth2TokenRepository.java

@@ -231,6 +231,7 @@ public Set<OAuth2AccessTokenEntity> getAccessTokensForResourceSet(ResourceSet rs
 public void clearDuplicateAccessTokens() {
 
 Query query = manager.createQuery("select a.jwt, count(1) as c from OAuth2AccessTokenEntity a GROUP BY a.jwt HAVING c > 1");
+@SuppressWarnings("unchecked")
 List<Object[]> resultList = query.getResultList();
 List<JWT> values = new ArrayList<>();
 for (Object[] r : resultList) {
@@ -251,8 +252,10 @@ public void clearDuplicateAccessTokens() {
  * @see org.mitre.oauth2.repository.OAuth2TokenRepository#clearDuplicateRefreshTokens()
  */
 @Override
+@Transactional(value="defaultTransactionManager")
 public void clearDuplicateRefreshTokens() {
 Query query = manager.createQuery("select a.jwt, count(1) as c from OAuth2RefreshTokenEntity a GROUP BY a.jwt HAVING c > 1");
+@SuppressWarnings("unchecked")
 List<Object[]> resultList = query.getResultList();
 List<JWT> values = new ArrayList<>();
 for (Object[] r : resultList) {