fix(scan): exec yum makecache to update metadata on RedHat based linux (#810)

* fix(scan): exec `yum makecache` to update metadata on RedHat based linux

* sudo

scan/oracle.go

@@ -165,3 +165,7 @@ func (o rootPrivOracle) yumUpdateInfo() bool {
 func (o rootPrivOracle) yumChangelog() bool {
 	return false
 }
+
+func (o rootPrivOracle) yumMakeCache() bool {
+	return true
+}