KCC: allow --test-all-reps-from to work with --import-ldif

KCC: allow --test-all-reps-from to work with --import-ldif

The ldif files lack information that a normal database has, which means
the ldif import function has to use some trickery to set the local DSA.
Once the local DSA is thus set, the fake database is a bit useless from
the point of view of other DSAs. We get around this by re-importing it
each time.

This is doing something slightly different than the normal samdb
--test-all-reps-from, in that the changes are not preserved between each
DSA's run. With the samdb database (unless using --readonly), the later
DSA's will see changes the early ones made. The ordering is arbitrary.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Thu Oct 29 08:11:54 CET 2015 on sn-devel-104