Revert "Remove 'openstack' tag from iscsi service"

This reverts commit 0f3357a209.

Reason for revert:
The openstack tag is used by variety of package resources, so it's not
specific to client packages.

Change-Id: If171ff72b2f4d74cf520c2b1b48a3526b1b0929e

manifests/iscsid.pp

@@ -27,6 +27,7 @@ class openstacklib::iscsid(
   package { 'open-iscsi':
     ensure => $package_ensure,
     name   => $::openstacklib::params::open_iscsi_package_name,
+    tag    => 'openstack',
   }
 
   # In CentOS9/RHEL9 initiatorname.iscsi is not created automatically

spec/classes/openstacklib_iscsid_spec.rb

@@ -6,6 +6,7 @@ describe 'openstacklib::iscsid' do
       it { is_expected.to contain_package('open-iscsi').with(
         :name   => platform_params[:open_iscsi_package_name],
         :ensure => 'present',
+        :tag    => 'openstack',
       )}
 
       it { is_expected.to contain_exec('create-initiatorname-file').with({