[LU-15403] improve a sanity 901 a bit.

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.15.0
• Severity: 3
• Assignee: Alexey Lyashkov
• Reporter: Alexey Lyashkov

Description

Current test implementation have a two bugs.
1) client mgc llogs processing is async to mount, so we can start a lock check before all locks processed, it caused a false alarm.
2) Server locks counting is unsafe, as it include an other server locks. so Any client reconnect may cause a false alarm.

Let's fix it.