bug 8649: create a temp directory for Zebra for C4::Search tests

bug 8649: create a temp directory for Zebra for C4::Search tests

The Zebra test uses Unix-domain sockets, which won't work if
Koha is being installed or tested from an NFS- or SSHFS-mounted
clone.  Therefore, create (and clenaup) a temporary directory on
(hopefully) a normal filesytem to run the test.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
Signed-off-by: wajasu <matted-34813@mypacks.net>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>