Set fixed allocation pools for tests that uses fixed IPs

Neutron may allocate additional IPs for internal services
which may conflict with hardcoded IPs in the tests. To avoid
this rase set allocation pool explicitly to do not overlap
with fixed_ip_address specified in the test

Change-Id: I6a5b32cba632b396d18b394061c669eb9d4e10d7

heat_tempest_plugin/tests/functional/test_create_update_neutron_port.py

@@ -31,6 +31,9 @@ resources:
       enable_dhcp: false
       network: { get_resource: net }
       cidr: 11.11.11.0/24
+      allocation_pools:
+        - start: 11.11.11.2
+          end: 11.11.11.9
   port:
     type: OS::Neutron::Port
     properties:

heat_tempest_plugin/tests/functional/test_nova_server_networks.py

@@ -33,6 +33,9 @@ resources:
     properties:
       network: {get_resource: net}
       cidr: 11.11.11.0/24
+      allocation_pools:
+        - start: 11.11.11.2
+          end: 11.11.11.9
   security_group:
     type: OS::Neutron::SecurityGroup
     properties:
@@ -76,6 +79,9 @@ resources:
     properties:
       network: {get_resource: net}
       cidr: 11.11.11.0/24
+      allocation_pools:
+        - start: 11.11.11.2
+          end: 11.11.11.9
   port:
     type: OS::Neutron::Port
     properties:
@@ -111,12 +117,18 @@ resources:
       network: {get_resource: net}
       cidr: 11.11.11.0/24
       name: subnet_a
+      allocation_pools:
+        - start: 11.11.11.2
+          end: 11.11.11.9
   subnet_b:
     type: OS::Neutron::Subnet
     properties:
       network: {get_resource: net}
       cidr: 12.12.12.0/24
       name: subnet_b
+      allocation_pools:
+        - start: 12.12.12.2
+          end: 12.12.12.9
   server:
     type: OS::Nova::Server
     properties:
@@ -147,6 +159,9 @@ resources:
       name: the_subnet
       network: {get_resource: net}
       cidr: 11.11.11.0/24
+      allocation_pools:
+        - start: 11.11.11.2
+          end: 11.11.11.9
   server:
     type: OS::Nova::Server
     properties: