[CIFS] Fix lease break for writes

On lease break we were breaking to readonly leases always
even if write requested.  Also removed experimental
ifdef around setlease code

Signed-off-by: Steve French <sfrench@us.ibm.com>

diff --cc fs/cifs/cifsfs.c
Simple merge

diff --cc fs/cifs/cifsfs.h
Simple merge

diff --cc fs/cifs/file.c
Simple merge