utils sssd, adding clean flag, clearing the cache on starts and restarts

[danlavu]

Two commits:

1. Adding a clean parameter to mkhomedir common configuration, the override_homedirs are failing because some directories already exist from other tests. After backing up homedir path, it will not clear it as well.
2. Adding a clean parameter to sssd start, restart to condense

client.sssd.stop()
client.sssd.clear()
client.sssd.start()

to

client.sssd.restart(clean=True)

[jakub-vavra-cz]

Looks good, I would not use None for the clean as it dowes not make a sense to me.
Maybe the clean should be default True? (no strong opinion there)

[danlavu]

Looks good, I would not use None for the clean as it dowes not make a sense to me. Maybe the clean should be default True? (no strong opinion there)

We would have to refactor the cache tests to set it to false. Let's minimize changing the behavior of existing methods.

[jakub-vavra-cz]

Looks good, I would not use None for the clean as it dowes not make a sense to me. Maybe the clean should be default True? (no strong opinion there)

We would have to refactor the cache tests to set it to false. Let's minimize changing the behavior of existing methods.

Ok, then it makes a sense to keep it False . Disregard my previous comment.

[jakub-vavra-cz]

LGTM