ipa trust-add command should be interactive

- Make ipa trust-add command interactive for realm_admin and realm_passwd
- Fix 'Active directory' typo to 'Active Directory'

https://fedorahosted.org/freeipa/ticket/3034

Reviewed-By: Jan Cholasta <jcholast@redhat.com>

ipalib/plugins/trust.py

@@ -435,7 +435,7 @@ sides.
         ),
         Password('realm_passwd?',
             cli_name='password',
-            label=_("Active directory domain administrator's password"),
+            label=_("Active Directory domain administrator's password"),
             confirm=False,
         ),
         Str('realm_server?',
@@ -511,6 +511,30 @@ sides.
 
         return result
 
+    def interactive_prompt_callback(self, kw):
+        """
+        Also ensure that realm_admin is prompted for if --admin or
+        --trust-secret is not specified when 'ipa trust-add' is run on the
+        system.
+
+        Also ensure that realm_passwd is prompted for if --password or
+        --trust-secret is not specified when 'ipa trust-add' is run on the
+        system.
+        """
+
+        trust_secret = kw.get('trust_secret')
+        realm_admin = kw.get('realm_admin')
+        realm_passwd = kw.get('realm_passwd')
+
+        if trust_secret is None:
+            if realm_admin is None:
+                kw['realm_admin'] = self.prompt_param(
+                           self.params['realm_admin'])
+
+            if realm_passwd is None:
+                kw['realm_passwd'] = self.Backend.textui.prompt_password(
+                           self.params['realm_passwd'].label, confirm=False)
+
     def validate_options(self, *keys, **options):
         if not _bindings_installed:
             raise errors.NotFound(