Fixed meaningless floating ';' in late_command

In cases where bonding isn't configured, the late_command was
left with a floating ' ; \' which may have been causing an
error in the installer of the form:
log-output: sh: syntax error: unexpected ";"

Partial-Bug: #1263310
Merge pull request #29 from CiscoSystems/bug_1263310

Fixed meaningless floating ';' in late_command