Allow users to choose the version of Swift to use

Fixes #442

static/directives/config/config-setup-tool.html

@@ -226,6 +226,12 @@
                          ng-model="config.DISTRIBUTED_STORAGE_CONFIG.local[1][field.name]">
                   <label for="dsc-{{ field.name }}">{{ field.placeholder }}</label>
                 </div>
+                <div ng-if="field.kind == 'option'">
+                  <select ng-model="config.DISTRIBUTED_STORAGE_CONFIG.local[1][field.name]">
+                    <option ng-repeat="value in field.values" value="{{ value }}"
+                            ng-selected="config.DISTRIBUTED_STORAGE_CONFIG.local[1][field.name] == value">{{ value }}</option>
+                  </select>
+                </div>
                 <div class="help-text" ng-if="field.help_url">
                   See <a href="{{ field.help_url }}" target="_blank">Documentation</a> for more information
                 </div>

static/js/core-config-setup.js

@@ -89,6 +89,7 @@ angular.module("core-config-setup", ['angularFileUpload'])
           ],
 
           'SwiftStorage': [
+            {'name': 'auth_version', 'title': 'Swift Version', 'kind': 'option', 'values': [1, 2]},
             {'name': 'auth_url', 'title': 'Swift Auth URL', 'placeholder': '', 'kind': 'text'},
             {'name': 'swift_container', 'title': 'Swift Container Name', 'placeholder': 'mycontainer', 'kind': 'text'},
             {'name': 'storage_path', 'title': 'Storage Path', 'placeholder': '/path/inside/container', 'kind': 'text'},

storage/swift.py

@@ -22,7 +22,11 @@ class SwiftStorage(BaseStorage):
     self._swift_user = swift_user
     self._swift_password = swift_password
 
-    self._auth_version = auth_version or 2
+    try:
+      self._auth_version = int(auth_version or '2')
+    except ValueError:
+      self._auth_version = 2
+
     self._os_options = os_options or {}
 
     self._initialized = False