* clear saml session on logout
* saml idp session logout test
* rename test func and use const for declaration
* clear current browser session on logout
* - add lib/idp/saml package to contain saml idp session cookie functions
- revert web/session package to remove SAML session cookie
- add clearSessionCookie func to clear web and saml session
* fix linter
* address review comments
* combine app, saml and web session deletion error
* remove debug logging in case saml cookie is not found
* update TODO comment for updating SAML session
* fix comment typo udpate -> update