Comment 1 for bug 1661337

Suggested fix:

=== modified file 'curtin/gpg.py'
--- curtin/gpg.py 2016-06-23 15:04:21 +0000
+++ curtin/gpg.py 2017-02-02 17:28:22 +0000
@@ -41,7 +41,7 @@
     LOG.debug('Receive gpg key "%s"', key)
     try:
         util.subp(["gpg", "--keyserver", keyserver, "--recv", key],
- capture=True)
+ capture=True, retries=(1, 2, 5, 10))
     except util.ProcessExecutionError as error:
         raise ValueError(('Failed to import key "%s" '
                           'from server "%s" - error %s') %