Blank info lines should not print "Info:"

[travisn]

There are many blank lines with “Info:”. There should only be “Info” if there is some text on the same line. So if the helper gets a blank info request, we should just print a blank line without "Info"

% bin/kubectl-rook-ceph rook status all
...
Info: cephrbdmirrors.ceph.rook.io
Info: 
Info: objectbucketclaims.objectbucket.io
Info: 
Info: objectbuckets.objectbucket.io
Info: 
Info: 
Info: