Messages fixed in this commit are wrapped at the end of other messages,
where the outer messages themselves have periods at the end. Thus the
extra periods of these messages should be removed to avoid duplication
in user facing messages.
An example for reference:
$ openstack firewall group rule create --source-port BEEF --protocol tcp
Invalid input for source_port. Reason: Invalid port: BEEF..
TrivialFix
Change-Id: I76bfed5a91cb569119e1e83ee3bf3917bb526e79
5f6a1259de