CA-74222 : Allow the Bond.create to carry on even if the MTU size is invalid , however log the error.

Signed-off-by: Akshay Ramani <akshay.ramani@citrix.com>
Merge pull request #1756 from simonjbeaumont/ca-74222-creedence

[xs64bit] CA-74222 : Allow the Bond.create to carry on even if the MTU size is invalid , however log the error.