makeaci, makeapi: use in-server API

Capture the server API rather than client API in API.txt. Client API may be
affected by client-side plugins and thus may not correspond to what is
transmitted over the wire.

https://fedorahosted.org/freeipa/ticket/4739

Reviewed-By: David Kupka <dkupka@redhat.com>

makeapi

@@ -456,8 +456,8 @@ def main():
     options, args = parse_options()
 
     cfg = dict(
-        context='cli',
-        in_server=False,
+        context='server',
+        in_server=True,
         in_tree=True,
         debug=False,
         verbose=0,