DB loader script: use created security groups

The db loader script can create security groups and virtual machine
interfaces but by default that interfaces are associated to the default
project security group. That patch permits to associate created security
groups to virtual machines interfaces. It's choosing security groups
randomly.

Change-Id: Ide03dc62eb6dfd193a57cbe822b01e55673fc57f
Closes-Bug: #1662276

src/config/utils/db-loader/contrail_db_loader/main.py

@@ -175,7 +175,8 @@ def create_resources(self):
                     self._rules_per_security_group)
             elif resource.type == 'virtual-machine-interface':
                 _, time_elapsed = resource.create_resources(
-                    self._resource_map['virtual-network'].amount_per_project)
+                    self._resource_map['virtual-network'].amount_per_project,
+                    self._resource_map['security-group'].amount_per_project)
             else:
                 _, time_elapsed = resource.create_resources()
             logger.info("%d resources were created to load %d '%s' in "

src/config/utils/db-loader/contrail_db_loader/resources/virtual_machine_interface.py

@@ -26,7 +26,7 @@ def total_amount(self):
         return self._project_amount * self._amount_per_project * 3
 
     @timeit(return_time_elapsed=True)
-    def create_resources(self, vn_per_project):
+    def create_resources(self, vn_per_project, sg_per_project):
         vms = []
         with self._uuid_cf.batch(queue_size=self._batch_size) as uuid_batch,\
                 self._fqname_cf.batch(queue_size=self._batch_size) as \
@@ -57,6 +57,7 @@ def create_resources(self, vn_per_project):
             for project_idx in range(self._project_amount):
                 for resource_idx in range(self._amount_per_project):
                     vn_idx = randint(0, vn_per_project - 1)
+                    sg_idx = randint(0, sg_per_project - 1)
                     fq_name = [
                         'default-domain',
                         'project-%d' % project_idx,
@@ -121,7 +122,7 @@ def create_resources(self, vn_per_project):
                             'to': [
                                 'default-domain',
                                 'project-%d' % project_idx,
-                                'default',
+                                'security-group-%d' % sg_idx,
                             ],
                             'attr': None,
                         }],