Switch to namespace sdtlib functions

puppetlabs-stdlib deprecated the existing functions in favor of
the new stdlib:: functions in 9.0.0. The version was released a few
years ago and now we assume we are ready to adopt to the migration.

Change-Id: I09615fad4f415add56fc4a73741e19dae7674fe0
Signed-off-by: Takashi Kajinami <kajinamit@oss.nttdata.com>

manifests/ceph.pp

@@ -34,7 +34,7 @@ class openstack_integration::ceph (
     $ms_bind_ipv6 = false
   }
 
-  ensure_packages(['lvm2'], {'ensure' => 'present', before  => Exec['lvm_create']})
+  stdlib::ensure_packages(['lvm2'], {'ensure' => 'present', before  => Exec['lvm_create']})
 
   exec { 'lvm_create':
     command   => "/bin/true # comment to satisfy puppet syntax requirements