Replace the old auth_opts to the new in notifier/zaqar.py
Replace the old auth_opts to the new in notifier/zaqar.py

change os_username to username, change os_passwd to passwd, change os_tenant_name to project_name, change os_auth_url to auth_url

Closes-Bug: #1699468

Change-Id: Ic81d30fc90673053bb2ce7a55a491c54bcc6776d

openstack/aodh,openstack/aodh