Fixing warning messages

6 jobs for master in 4 minutes and 27 seconds (queued for 47 seconds)
Status Job ID Name Coverage
  Build
passed #9408
centos
centos_build

00:01:04

passed #9409
mac
mac_build

00:01:32

passed #9410
ubuntu
ubuntu_build

00:01:47

 
  Test
passed #9411
centos
centos_run

00:00:01

passed #9412
mac
mac_run

00:00:01

passed #9413
ubuntu
ubuntu_run

00:00:01