keycloak: Set SSO Session Idle to one week, Session Max to one month

It enables to extend an OpenID Connect refresh token expiration
from 30 minutes to one week.

It means a user does not have to login with his credentials again
during that idle period.

For instance when a user logged in into SWH Web Applications using
a browser, if he visits the website again during that idle period
he will remain connected to his authenticated session.

Also extend max session duration to one month.

Related to T3272