fix(gost): close gost DB connection in server mode #1217 (#1221)

gost/gost.go

@@ -21,6 +21,7 @@ type DBDriver struct {
 // Client is the interface of OVAL client.
 type Client interface {
 	DetectUnfixed(*models.ScanResult, bool) (int, error)
+	CloseDB() error
 }
 
 // Base is a base struct
@@ -28,6 +29,10 @@ type Base struct {
 	DBDriver DBDriver
 }
 
+func (b Base) CloseDB() error {
+	return b.DBDriver.DB.CloseDB()
+}
+
 // FillCVEsWithRedHat fills CVE detailed with Red Hat Security
 func FillCVEsWithRedHat(r *models.ScanResult, cnf config.GostConf) error {
 	db, locked, err := newGostDB(cnf)