[LU-1403] ucred code cleanup

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.4.0
• Labels: patch
• Severity: 3
• Assignee: Nathaniel Clark
• Reporter: Vitaly Fertman

Description

ucred data is used sometimes even without a check it was initialized.
cleaning up this code to make it more robust.

Issue Links

• is related to: LU-2246 failure on sanity.sh test_132: ASSERTION( env->le_ses != ((void *)0) ) failed