LU-14327 tests: skip sanity-sec test 55 for older servers

LU-14327 tests: skip sanity-sec test 55 for older servers

sanity-sec test 55 was added to lustre-master version
2.13.57.12 and to lustre-b2_12 version 2.12.6.3.  When
we run version interop testing with Lustre servers less
than these versions, the test will fail.  Thus, skip
sanity-sec test 55 for Lustre severs less than 2.12.6.3.

Fixes: 355787745f21 (“LU-14121 nodemap: do not force fsuid/fsgid squashing”)

Test-Parameters: trivial
Test-Parameters: serverversion=2.12.6 serverdistro=el7.9 env=ONLY=55 testlist=sanity-sec
Signed-off-by: James Nunez <jnunez@whamcloud.com>
Change-Id: Ie002c921e853897105396185b38485799df31b7a
Reviewed-on: https://review.whamcloud.com/43949
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Wei Liu <sarah@whamcloud.com>
Reviewed-by: Vikentsi Lapa <vlapa@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>