Add 'deployment_type' configuration parameter

Value of this parameter will be refered in the code to determine
if containers are being launched inside virtual machines or on baremetal
machines.

Partially Implements blueprint containers-in-instances

Change-Id: Icbd561504c9bc39dbf7ef4b0f97561882dd8b1c2

kuryr/lib/config.py

@@ -27,6 +27,10 @@ core_opts = [
     cfg.StrOpt('subnetpool_name_prefix',
                default='kuryrPool',
                help=_('Neutron subnetpool name will be prefixed by this.')),
+    cfg.StrOpt('deployment_type',
+               default='baremetal',
+               help=_("baremetal or nested-containers are the supported"
+                      " values.")),
 ]
 
 neutron_group = cfg.OptGroup(

kuryr/tests/unit/test_config.py

@@ -25,3 +25,5 @@ class ConfigurationTest(base.TestCase):
                          cfg.CONF.neutron.default_subnetpool_v6)
         self.assertEqual('public',
                          cfg.CONF.neutron.endpoint_type)
+        self.assertEqual('baremetal',
+                         cfg.CONF.deployment_type)