Allow _LockList to handle locking.ALL_SET
Allow _LockList to handle locking.ALL_SET

This patch makes a minor adjustment to _LockList in order for it to
be capable of accepting locking.ALL_SET without issues.

Signed-off-by: Hrvoje Ribicic <be5828fca31f89218048bec4189e30a581aa65da@google.com>
Reviewed-by: Petr Pudlak <pudlak@google.com>

Cherry-picked from: 038a9f8f6c34d78e97cda16f913e267ce92d52f4

Signed-off-by: Hrvoje Ribicic <be5828fca31f89218048bec4189e30a581aa65da@google.com>
Reviewed-by: Klaus Aehlig <4ce51de36d9068cd7db2eec1151e0f3f95419008@google.com>

grnet/snf-ganeti,mbakke/ganeti,bitemyapp/ganeti,onponomarev/ganeti,ganeti-github-testing/ganeti-test-1,yiannist/ganeti,leshchevds/ganeti,andir/ganeti,apyrgio/ganeti,andir/ganeti,dimara/ganeti,mbakke/ganeti,onponomarev/ganeti,grnet/snf-ganeti,yiannist/ganeti,ganeti/ganeti,leshchevds/ganeti,apyrgio/ganeti,bitemyapp/ganeti,dimara/ganeti,ganeti/ganeti,leshchevds/ganeti,ganeti/ganeti,yiannist/ganeti,andir/ganeti,ganeti-github-testing/ganeti-test-1,mbakke/ganeti