Systemd service units may require additional environment settings to
be effective. This patch adds two new variables to the systemd_service
role which will allow operators to add environment variables to a
given service as needed. These options be be supplied globally or
from within a service definition.
Documentation on how these options are used has been added to the
defaults file.
A test has been added to ensure we're exercising the new capability.
Change-Id: If4ea993b7173ac3218f051a1d4f0fba9aeb838ea
Signed-off-by: Kevin Carter <kevin@cloudnull.com>
79e6cdb138