[LU-4808] sanity tests cleanup to work on Xeon Phi

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.6.0, Lustre 2.7.0, Lustre 2.5.2
• Severity: 3
• Assignee: Dmitry Eremin (Inactive)
• Reporter: Dmitry Eremin (Inactive)

Description

• Made the test_74c robust to different platforms.
• Fix an issue with values more than 2^32 (for example 9.36473e+09).
• Fix an integer comparison in case of empty variable.
• Check for tools presents (rsync and getfattr).
• Check for CLIENTONLY mode.
• Remove "-x" options from greep (it's not always supported).
• Condding style cleanup.

Issue Links

• is related to: LU-9205 sanity.sh fails in CLIENTONLY mode