Avoid conflicting names for security groups

... to prevent the following error in nova.

Instance failed network setup after 1 attempt(s):
nova.exception.NoUniqueMatch: Multiple security groups found matching
'the_sg'. Use an ID to be more specific.

Change-Id: I680d169e63f6c941f79de56f541681260301fe20
diff --git a/heat_tempest_plugin/tests/scenario/templates/test_server_signal.yaml b/heat_tempest_plugin/tests/scenario/templates/test_server_signal.yaml
index df7e4ef..0b4d90d 100644
--- a/heat_tempest_plugin/tests/scenario/templates/test_server_signal.yaml
+++ b/heat_tempest_plugin/tests/scenario/templates/test_server_signal.yaml
@@ -33,7 +33,6 @@
   sg:
     type: OS::Neutron::SecurityGroup
     properties:
-      name: the_sg
       description: Ping and SSH
       rules:
       - protocol: icmp
diff --git a/heat_tempest_plugin/tests/scenario/templates/test_server_software_config.yaml b/heat_tempest_plugin/tests/scenario/templates/test_server_software_config.yaml
index 9df6532..9912042 100644
--- a/heat_tempest_plugin/tests/scenario/templates/test_server_software_config.yaml
+++ b/heat_tempest_plugin/tests/scenario/templates/test_server_software_config.yaml
@@ -35,7 +35,6 @@
   the_sg:
     type: OS::Neutron::SecurityGroup
     properties:
-      name: the_sg
       description: Ping and SSH
       rules:
       - protocol: icmp