fix typo: properties.login --> properties.saml_login

Most people wouldn't notice/care.  But I colocate saml_login with another job that uses 8080, so without this fix I need to specify both properties.login.port and properties.saml_login.port, even though I am not using the login job.
Merge pull request #115 from kushmerick/patch-1

fix typo: properties.login --> properties.saml_login