Fix payload check for out-of-band health
Fix payload check for out-of-band health

This logic error was not detected before as health has not been
implemented on the cli and therefore no QA code existed for that.

Signed-off-by: René Nussbaumer <bc755ac45a0e799d1d490cba76febc56d80cc5fc@google.com>
Reviewed-by: Iustin Pop <acf83a5274f31a43af6b914614365999469c1a31@google.com>

yiannist/ganeti,dimara/ganeti,dimara/ganeti,bitemyapp/ganeti,mbakke/ganeti,apyrgio/ganeti,andir/ganeti,yiannist/ganeti,andir/ganeti,leshchevds/ganeti,onponomarev/ganeti,mbakke/ganeti,andir/ganeti,ganeti/ganeti,ganeti-github-testing/ganeti-test-1,mbakke/ganeti,grnet/snf-ganeti,ganeti-github-testing/ganeti-test-1,onponomarev/ganeti,ganeti/ganeti,leshchevds/ganeti,apyrgio/snf-ganeti,apyrgio/snf-ganeti,grnet/snf-ganeti,apyrgio/ganeti,bitemyapp/ganeti,ganeti/ganeti,leshchevds/ganeti,yiannist/ganeti