s4/torture: port SMBv1 RAW-LOCK tests to SMBv2

[tridge at samba.org]

Hi Andrew,

 > We must *always* have 'make test' passing in both trees, whenever
 > torture changes are made.  It is not enough for changes to be 'correct',
 > the server code it tests should be fixed, or at an absolute last resort,
 > the tests marked up as knownfail.  In this case, the test hangs, which
 > must be fixed regardless. 

I've got changes pending in my tree (see tridge/tests-wip) which fix
these breakages. I'll push once I've done more testing.

Cheers, Tridge