Add integrations tests from git cli (#3377)

* test: integration add git cli tests

Extracted form for easing review process and debug #3152

* test: integration add git cli big file commit

* fix:  Don't rewrite key if internal server

models/ssh_key.go

@@ -304,6 +304,11 @@ func CheckPublicKeyString(content string) (_ string, err error) {
 
 // appendAuthorizedKeysToFile appends new SSH keys' content to authorized_keys file.
 func appendAuthorizedKeysToFile(keys ...*PublicKey) error {
+	// Don't need to rewrite this file if builtin SSH server is enabled.
+	if setting.SSH.StartBuiltinServer {
+		return nil
+	}
+
 	sshOpLocker.Lock()
 	defer sshOpLocker.Unlock()
 
@@ -532,6 +537,11 @@ func DeletePublicKey(doer *User, id int64) (err error) {
 // Note: x.Iterate does not get latest data after insert/delete, so we have to call this function
 // outside any session scope independently.
 func RewriteAllPublicKeys() error {
+	//Don't rewrite key if internal server
+	if setting.SSH.StartBuiltinServer {
+		return nil
+	}
+
 	sshOpLocker.Lock()
 	defer sshOpLocker.Unlock()