make integration tests work in other OS

This bug was originally filed in Launchpad as [LP: #1754253](https://bugs.launchpad.net/cloud-init/+bug/1754253)

Launchpad details

affected_projects = []

assignee = None

assignee_name = None

date_closed = None

date_created = 2018-03-08T06:52:01.404917+00:00

date_fix_committed = None

date_fix_released = None

id = 1754253

importance = medium

is_complete = False

lp_url = https://bugs.launchpad.net/cloud-init/+bug/1754253

milestone = None

owner = d-info-e

owner_name = do3meli

private = False

status = confirmed

submitter = d-info-e

submitter_name = do3meli

tags = []

duplicates = []

_Launchpad user **do3meli(d-info-e)** wrote on 2018-03-08T06:52:01.404917+00:00_

most of the integration tests are written for ubuntu and have hardcoded paths, service names or package names that may are different on other OS. it would be good to have the possibility to run integration tests in another os than ubuntu. this would as far as i can tell require a lot of tests to be rewritten. but first, there must be an easy way to get os specific variables for a certain module into the test class. for example how could the SaltConstant class being accessed from within the salt_minion.yaml so we don't have to hardcode paths ect. in the collection scripts?