Add default metadata for public network

Add deafult value for all models
Metadata will be replace in deployment by steps
from shared-salt:
https://github.com/Mirantis/tcp-qa/blob/master/tcp_tests/templates/shared-salt.yaml#L431

Change-Id: I99f4daaa0aee28ca6eca3b9cae3cc380c749d58d
diff --git a/tcp_tests/templates/cookied-bm-mcp-ocata-contrail-nfv/lab04-physical-inventory.yaml b/tcp_tests/templates/cookied-bm-mcp-ocata-contrail-nfv/lab04-physical-inventory.yaml
index e66753d..164256c 100644
--- a/tcp_tests/templates/cookied-bm-mcp-ocata-contrail-nfv/lab04-physical-inventory.yaml
+++ b/tcp_tests/templates/cookied-bm-mcp-ocata-contrail-nfv/lab04-physical-inventory.yaml
@@ -79,3 +79,10 @@
           tenant_address: 192.168.0.102

           dpdk_pci: "'0000:05:00.0'"

           dpdk_mac: '00:1b:21:87:21:98'

+

+environment_metadata:

+    public_gateway: 172.17.16.1

+    public_cidr: 172.17.16.0/24

+    public_allocation_start: 172.17.16.201

+    public_allocation_end: 172.17.16.245

+    tempest_test_target: ctl01*