store tokens with .serialize() not .toString()

openid-connect-common/src/main/java/org/mitre/oauth2/model/OAuth2AccessTokenEntity.java

@@ -166,7 +166,7 @@ public class OAuth2AccessTokenEntity implements OAuth2AccessToken {
     @Basic
     @Column(name="token_value")
     public String getValue() {
-	    return jwtValue.toString();
+	    return jwtValue.serialize();
     }
 
     /**

openid-connect-common/src/main/java/org/mitre/oauth2/model/OAuth2RefreshTokenEntity.java

@@ -117,7 +117,7 @@ public class OAuth2RefreshTokenEntity implements OAuth2RefreshToken {
     @Basic
     @Column(name="token_value")
     public String getValue() {
-	    return jwt.toString();
+	    return jwt.serialize();
     }
 
     /**