Support the X-Forwarded-Proto insertion header

This is a follow up of Id017bb277eebae98f0441663e41d07b40b6e3e38,
which added support for the X-Forwarded-Proto insertion header on
listeners.

Change-Id: Ifdf73015e12fea1ddac2c6168f34f1c452a9a9cb
Story: 2004165
Task: 27642

octavia_dashboard/static/dashboard/project/lbaasv2/workflow/listener/listener.help.html

@@ -34,7 +34,7 @@
   <strong translate>Insert Headers:</strong>
   <translate>
   Additional headers insertion into HTTP header,
-  only "X-Forwarded-For" and "X-Forwarded-Port" are supported.
+  only "X-Forwarded-For", "X-Forwarded-Port" and "X-Forwarded-Proto" are supported.
   </translate>
 </p>
 <p>

octavia_dashboard/static/dashboard/project/lbaasv2/workflow/listener/listener.html

@@ -184,7 +184,22 @@
                  id="x_forwarded_port"
                  ng-model="model.spec.listener.insert_headers['X-Forwarded-Port']">
           <label for="x_forwarded_port">
-            <span translate>X-Forwarded-port</span>
+            <span translate>X-Forwarded-Port</span>
+          </label>
+        </div>
+      </div>
+    </div>
+
+    <div class="col-xs-12 col-sm-8 col-md-6">
+      <div class="form-group">
+        <div class="themable-checkbox">
+          <input type="checkbox"
+                 ng-true-value="'True'"
+                 ng-false-value="''"
+                 id="x_forwarded_proto"
+                 ng-model="model.spec.listener.insert_headers['X-Forwarded-Proto']">
+          <label for="x_forwarded_proto">
+            <span translate>X-Forwarded-Proto</span>
           </label>
         </div>
       </div>

octavia_dashboard/static/dashboard/project/lbaasv2/workflow/model.service.spec.js

@@ -37,7 +37,8 @@
           sni_container_refs: ['container2'],
           insert_headers: {
             'X-Forwarded-For': 'True',
-            'X-Forwarded-Port': 'True'
+            'X-Forwarded-Port': 'True',
+            'X-Forwarded-Proto': 'True'
           }
         },
         pool: {
@@ -2490,6 +2491,20 @@
       });
     });
 
+    describe('Model visible resources (edit listener, no x forwared proto)', function() {
+
+      beforeEach(function() {
+        delete listenerResources.listener.insert_headers['X-Forwarded-Proto'];
+        delete listenerResources.pool;
+        model.initialize('listener', '1234');
+        scope.$apply();
+      });
+
+      it('should only show listener details', function() {
+        expect(model.context.resource).toEqual('listener');
+      });
+    });
+
     describe('Model visible resources (edit listener, no pool)', function() {
 
       beforeEach(function() {

releasenotes/notes/add-x-forwarded-proto-e30b52a3f853ed62.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    Adds the ability to set the X-Forwarded-Proto insertion header on
+    listeners.