SSO Role modifications

[scriptsrc]

PR #576 allowed for automatically setting user roles based on group membership.

This had an unanticipated impact on our install where user roles were being downgraded to View on login. The reason is that the PR modified existing users as well as new users. Also, the PR required a new config value ADMIN_GROUP / JUSTIFY_GROUP be placed into the config file. Also, the PR checked the SSO response for the keyword groups, whereas our SSO returns googleGroups.

• I've modified the SSO code to check the profile for both groups and for googleGroups when using PING.
• I also modified the SSO code to only assign a role for new user creation. Existing users will not be impacted. This means the current security_monkey installs won't be required to modify their config file to maintain current functionality.

[coveralls]

Coverage increased (+0.04%) to 56.659% when pulling 22534ed on sso_updates into 6b10971 on develop.