Partially revert "Convert dynamic includes to static imports"

This reverts parts of commit 68d2839e1825d942f9afc76a6ee4329b9b031e26.

When running the nova playbooks without having "nova_virt_type" set. It
failed with:

"Error when evaluating variable in dynamic parent include path:
 drivers/{{ nova_virt_type }}/nova_compute_{{ nova_virt_type }}.yml.
 When using static imports, the parent dynamic include cannot utilize
 host facts or variables from inventory"

since the above commit. In ansible it's not allowed to call import_tasks
from a playbook which was included via include_tasks using a dynamic
include path. So we're switching back to "include_tasks" for the
affected playbook.

Change-Id: Ia0227886bd2cc59aab6d2861ef4aa9358d160925
Closes-Bug: 1845497

tasks/drivers/kvm/nova_compute_kvm.yml

@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-- import_tasks: nova_compute_kvm_install.yml
+- include_tasks: nova_compute_kvm_install.yml
   tags:
     - nova-install
 
@@ -47,7 +47,7 @@
     - nova-kvm
 
 - name: Set kernel permissions to enable libguestfs features (Ubuntu)
-  import_tasks: nova_kernel_permissions.yml
+  include_tasks: nova_kernel_permissions.yml
   when:
     - ansible_distribution == 'Ubuntu'
     - nova_libvirt_inject_key | bool or nova_libvirt_inject_password | bool
@@ -140,19 +140,19 @@
     - nova-kvm
     - nova-libvirt
 
-- import_tasks: nova_disable_smt.yml
+- include_tasks: nova_disable_smt.yml
   when:
     - ansible_architecture == 'ppc64le'
   tags:
     - nova-config
 
-- import_tasks: nova_enable_ksm.yml
+- include_tasks: nova_enable_ksm.yml
   when:
     - nova_compute_ksm_enabled | bool
   tags:
     - nova-config
 
-- import_tasks: nova_compute_kvm_virsh_net_remove.yml
+- include_tasks: nova_compute_kvm_virsh_net_remove.yml
   tags:
     - nova-config
     - nova-kvm