Add HugePages support for creating environments

- Add environment variable DRIVER_USE_HUGEPAGES=false (default)
  to libvirt-based templates
- Remove outdated templates (mk22/aio)

Change-Id: Id8726917cf43dd45bf5cf73a2e76b74dfb0409ea
Reviewed-on: https://review.gerrithub.io/369602
Reviewed-by: Tatyanka Leontovich <tleontovich@mirantis.com>
Tested-by: Tatyanka Leontovich <tleontovich@mirantis.com>
diff --git a/tcp_tests/templates/virtual-mcp-ocata-dvr/underlay.yaml b/tcp_tests/templates/virtual-mcp-ocata-dvr/underlay.yaml
index 79ac209..d23ff34 100644
--- a/tcp_tests/templates/virtual-mcp-ocata-dvr/underlay.yaml
+++ b/tcp_tests/templates/virtual-mcp-ocata-dvr/underlay.yaml
@@ -107,6 +107,7 @@
             hpet: False
             enable_acpi: true
             use_host_cpu: !os_env DRIVER_USE_HOST_CPU, true
+            use_hugepages: !os_env DRIVER_USE_HUGEPAGES, false
 
         network_pools:
           admin: admin-pool01