Remove trailing comma
Remove trailing comma

Closes-Bug: #1217135

There are trailing commas in default value of some options, uncomment
them will cause CRITICAL error for neutron-server. These sample config
may mislead operators, so this patch fix them to the correct format.

Change-Id: Ie0b7626aade653b761257eb2bf397cb3cc5a961e

gkotton/vmware-nsx,gkotton/vmware-nsx