s4/torture/smb2: port raw.samba3caseinsensitive

SMB1 test seems to be all about testing if the search filter that is applied is treated in a non case sensitive way.

The SMB2 test had to be changed slightly as the orig SMB1 test was testing a filter applied over nested directories (starting from the share root). The SMB2 test doesn't seem to have this ability so a different filter (still tested to ensure it is case-insensitive) is used to search at a single directory level.

Signed-off-by: Noel Power noel.power@suse.com