flapping.cephfs: Add specific smb2.session tests as knownfail

Many of the tests from smb2.session torture suite are already
failing on XFS for which flapping.xfs already contains an entry
to skip any such failures. With recent update to selftest entries
from upstream, compared to flapping.xfs we are left with only one
failure(smb2.session.reauth4) which needs to be investigated before
adding it to the flapping list.

Signed-off-by: Anoop C S <[email protected]>

Author: anoopcs9

testcases/smbtorture/selftest/flapping.cephfs

@@ -4,3 +4,7 @@
 # This is a known fail for samba4 env. We explicitly mark env as
 # samba3 which means we don't ever match with this knownfail.
 ^samba3.smb2.create.quota-fake-file
+
+# Ignore due to lack of proper multichannel setup.
+^samba3.smb2.session.bind2
+^samba3.smb2.session.two_logoff