Fix org visibility bug when git cloning (#6743)

* fix org visibility bug

* fix permission check

* add integration tests

* fix tests

* change test user name for easier maintainance and fix test

* fix test git repo name

models/user.go

@@ -538,7 +538,11 @@ func (u *User) IsUserOrgOwner(orgID int64) bool {
 
 // IsUserPartOfOrg returns true if user with userID is part of the u organisation.
 func (u *User) IsUserPartOfOrg(userID int64) bool {
-	isMember, err := IsOrganizationMember(u.ID, userID)
+	return u.isUserPartOfOrg(x, userID)
+}
+
+func (u *User) isUserPartOfOrg(e Engine, userID int64) bool {
+	isMember, err := isOrganizationMember(e, u.ID, userID)
 	if err != nil {
 		log.Error("IsOrganizationMember: %v", err)
 		return false