s4:torture: Add command line parameter --fullname

s4:torture: Add command line parameter --fullname

This argument is used to print out the the full name which includes the
name of the test suite.

For example, the name in the output for the test smb2.read.dir is "dir".
By using the --fullname parameter, the name used will be
"smb2.read.dir".

The default continues to be to use the shortname.

Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>

Signed-off-by: Sachin Prabhu <sprabhu@redhat.com>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>