Pull find_by_prinicpalname from authenticate
Merge pull request #561 from kbrock/fix_user

Separate ldap authentication into find_by_principlename and password checking
ManageIQ domain - Correct /system/policy instance relationship values.

Fixed the /system/policy/request_denied and request_pending instances
relationship values to:
/System/Policy/${/#miq_request.type}_(action_here)

Added /System/policy instances for MiqProvisionRequest denied and pending.

https://bugzilla.redhat.com/show_bug.cgi?id=1141289