Fix multiple additional flags for docker_network

Each additional flag has to be pushed as extra String otherwise
Docker will complain about uknown flag.

Signed-off-by: Pavel Matěja <[email protected]>

Author: lemrouch

Diff for: lib/puppet/provider/docker_network/ruby.rb

@@ -23,12 +23,17 @@ def network_conf
       ['--ipam-driver=%s',  :ipam_driver],
       ['--aux-address=%s',  :aux_address],
       ['--opt=%s',          :options],
-      ['%s',                :additional_flags],
     ].each do |(format, key)|
       values    = resource[key]
       new_flags = multi_flags.call(values, format)
       flags.concat(new_flags)
     end
+    if resource[:additional_flags].is_a?(String)
+      additional_flags = resource[:additional_flags].split
+      additional_flags.each do |additional_flag|
+        flags << additional_flag
+      end
+    end
     flags << resource[:name]
   end