EX-5060 tests: skip sanity-lipe in test interop

EX-5060 tests: skip sanity-lipe in test interop

Since lipe is server-only, it doesn't have any benefit to test in
interop mode, since this just exposes failures due to new tests
failing with old servers, but provides no real benefit.

If/when a client interface for lipe_find is available then this
needs to be revisited.

Test-Parameters: trivial testlist=sanity-lipe serverversion=2.14.0-ddn23
Fixes: a4c8c816a67a ("EX-4965 lipe: use new e2fsprogs xattr API")
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: I6def018ecf177926c2785205281852c5db251903
Reviewed-on: https://review.whamcloud.com/47724
Reviewed-by: Jian Yu <yujian@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>