Update Google SSO requirements

Please update this page accordingly: https://www.google.com/enterprise/marketplace/viewListing?productListingId=3421+6389312883797462351

If JIRA OnDemand only uses Google credentials to authenticate then you really need to update the permissions that you are asking when OnDemand is installed from the Google Marketplace. At the moment it is asking for alot more than just the login credentials and this can definitely spook people (witness my little group going from "get JIRA going today" to "woa... thats no good... lets just use a spreadsheet or something". It is also a good thing from a covering Atlassian's backside point of view: if you ask for permissions than you need and then (heaven forbid) get hacked you will do less damage to your customers than you might otherwise.