This update refactors daemon_system_type function so that it
returns a SIMPLEX system type if it is unable to properly
find and parse the system_mode/system_type from platform.conf
This is needed for Ansible Bootstrap Deployment where mtcAgent
and mtcClient need to run and function like it would in a
simplex system prior to the system type being added to the
platform.conf file.
Change-Id: Ib0130f3559ee3aa8d8d8203ea59d4896a571944f
Story: 2004695
Task: 28714
Signed-off-by: Eric MacDonald <eric.macdonald@windriver.com>