[LU-12920] build: lbuild script should not continue if it's missing ed

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.14.0, Lustre 2.12.4
• Severity: 3
• Assignee: Minh Diep
• Reporter: Minh Diep

Description

'ed' command is crucial in the script and we should not continue if there isn't one on the builder