Allow user upload CA bundle file for Glance with VMware backend

Add field that allows user to upload CA certificate that emitted
vCenters TLS/SSL certificate. It allow Glance with VMware backend verify
connection to vCenter server (verification is turned on by default).
If user did not uploaded certificate then, glance will be configured
to skip verification step during connection to vCenter.

Partial-bug: #1559067
DocImpact: Document how to use 'CA file' field on VMware tab.
Change-Id: I810bc000e54b941018a1190acb26d33150b74ce0

nailgun/nailgun/fixtures/openstack.yaml

@@ -1626,6 +1626,11 @@
                 regex:
                   source: *non_empty_string
                   error: "Invalid datastore"
+              -
+                name: "ca_file"
+                type: "file"
+                label: "CA file"
+                description: "File containing the trusted CA bundle that emitted vCenter server certificate. If empty vCenters certificate is not verified."
         value:
           availability_zones:
             -
@@ -1651,6 +1656,7 @@
             vcenter_password: ""
             datacenter: ""
             datastore: ""
+            ca_file: ""
     components_metadata:
       - name: hypervisor:qemu
         default: true

nailgun/nailgun/fixtures/vmware_attributes.json

@@ -129,6 +129,12 @@
                             "source": "\\S",
                             "error": "Empty datastore"
                         }
+                    },
+                    {
+                        "type": "file",
+                        "description": "File containing the trusted CA bundle that emitted vCenter server certificate. If empty vCenters certificate is not verified.",
+                        "name": "ca_file",
+                        "label": "CA file"
                     }
                 ],
                 "type": "object",
@@ -195,7 +201,8 @@
                 "vcenter_username": "admin",
                 "vcenter_password": "secret",
                 "datacenter": "test_datacenter",
-                "datastore": "test_datastore"
+                "datastore": "test_datastore",
+                "ca_file": "file_blob"
             },
             "network": {
                 "esxi_vlan_interface": "eth0"

nailgun/nailgun/orchestrator/base_serializers.py

@@ -239,7 +239,8 @@ class VmwareDeploymentSerializerMixin(object):
                     'vc_user': glance_username,
                     'vc_password': glance_password,
                     'vc_datacenter': glance_instance.get('datacenter', ''),
-                    'vc_datastore': glance_instance.get('datastore', '')
+                    'vc_datastore': glance_instance.get('datastore', ''),
+                    'vc_ca_file': glance_instance.get('ca_file', '')
                 }
 
         return vmware_data

nailgun/nailgun/test/integration/test_orchestrator_serializer.py

@@ -2578,6 +2578,7 @@ class BaseDeploymentSerializer(BaseSerializerTest):
         self.assertEqual(result['glance']['vc_password'], "secret")
         self.assertEqual(result['glance']['vc_datacenter'], "test_datacenter")
         self.assertEqual(result['glance']['vc_datastore'], "test_datastore")
+        self.assertEqual(result['glance']['vc_ca_file'], "file_blob")
 
     def check_no_murano_data(self):
         glance_properties = self.serializer.generate_test_vm_image_data(