[SSSD][PATCH] ldap_test.py: Modify enum cache timeouts

[Michal Židek]

Hi!

I saw some integration tests failures recently,
and I think there is a race condition between the
enumeration refresh timeout and the sleeps
after some operations that wait for this timeout.
SSSD fails to populate changes from LDAP in time
and some asserts can fail because of this.

So far I saw 4 tests to fail like this, which
is already quite a lot.

The attached patch modifies the timeout values
and hopefully removes the issue.

Michal