Go vet attempts to detect missing format arguments or format strings in
non-format contexts.  However, the default list of functions does not
include many of our logging functions (like Warningf, Debugf, etc.).
This CR enables the additional vetting and fixes the errors that it
catches.

Change-Id: I4eefdf84d9349f2ae08da9bb0c9b829226219c44
Signed-off-by: Jason Yellick <jyellick@us.ibm.com>