Upgrade to etcd v3.5.15

Using new proto of ETCD v3.5.15 with some new functions:

1. user_add
2. user_delete
3. user_get
4. user_list
5. role_add
6. role_delete
7. role_get
8. role_list
9. role_grant_permission
10. user_grant_role

Test Env

• Python 3.8.10
• ETCD v3.5.15 + SSL + Enable Auth + Client Cert Auth + Common Name

from etcd3 import Etcd3Client
CERT_PATH="/home/ubuntu/etcd/etcd-v3.5.15-linux-amd64/etcd-server.crt"
KEY_PATH="/home/ubuntu/etcd/etcd-v3.5.15-linux-amd64/etcd-server.key"
CA_PATH="/home/ubuntu/etcd/etcd-v3.5.15-linux-amd64/etcd-ca.crt"

client = Etcd3Client(host='192.168.100.122', port=2379, ca_cert=CA_PATH, cert_key=KEY_PATH, cert_cert=CERT_PATH, user="root", password="MyEasyPass")

client.user_add(name='test4', password='')  # Empty mean no_password
client.role_add(name='test4')
client.role_grant_permission(name='test4', key='/pub4', permType='READWRITE', prefix=True)
client.user_grant_role(user='test4', role='test4')