Favors dash instead of underscore in autoinstall

Most autoinstall things are using dash instead of underscore.

autoinstall-schema.json

@@ -461,13 +461,13 @@
                 "additionalProperties": false
             }
         },
-        "active_directory": {
+        "active-directory": {
             "type": "object",
             "properties": {
-                "admin_name": {
+                "admin-name": {
                     "type": "string"
                 },
-                "domain_name": {
+                "domain-name": {
                     "type": "string"
                 }
             },

documentation/autoinstall-reference.md

@@ -406,7 +406,7 @@ The hostname for the system.
 
 The password for the new user, crypted. This is required for use with sudo, even if SSH access is configured.
 
-### active_directory
+### active-directory
 
 **type:** mapping, see below
 **default:** no default
@@ -416,11 +416,11 @@ Accepts data required to join the target system in an Active Directory domain.
 
 A mapping that can contain keys, all of which take string values:
 
-#### admin_name
+#### admin-name
 
 A domain account name with privilege to perform the join operation. That account's password will be requested during runtime.
 
-#### domain_name
+#### domain-name
 
 The Active Directory domain to join.
 

subiquity/server/controllers/ad.py

@@ -93,34 +93,35 @@ class AdController(SubiquityController):
     """ Implements the server part of the Active Directory feature. """
     endpoint = API.active_directory
     # No auto install key and schema for now due password handling uncertainty.
-    autoinstall_key = model_name = "active_directory"
+    autoinstall_key = "active-directory"
+    model_name = "active_directory"
     autoinstall_schema = {
         'type': 'object',
         'properties': {
-            'admin_name': {
+            'admin-name': {
                 'type': 'string',
             },
-            'domain_name': {
+            'domain-name': {
                 'type': 'string',
             },
         },
         'additionalProperties': False,
     }
-    autoinstall_default = {"admin_name": '', 'domain_name': ''}
+    autoinstall_default = {"admin-name": '', 'domain-name': ''}
 
     def make_autoinstall(self):
         info = self.model.conn_info
         if info is None:
             return None
 
-        return {'admin_name': info.admin_name, 'domain_name': info.domain_name}
+        return {'admin-name': info.admin_name, 'domain-name': info.domain_name}
 
     def load_autoinstall_data(self, data):
         if data is None:
             return
-        if 'admin_name' in data and 'domain_name' in data:
-            info = AdConnectionInfo(admin_name=data['admin_name'],
-                                    domain_name=data['domain_name'])
+        if 'admin-name' in data and 'domain-name' in data:
+            info = AdConnectionInfo(admin_name=data['admin-name'],
+                                    domain_name=data['domain-name'])
             self.model.set(info)
             self.model.do_join = False