Add owner field for all db kinds

configurator complains at startup about the missing owner field:

1970-01-14T03:25:38.425801Z [45] user.err configurator [] Configurator
DB_KIND_CONFIG_ERROR {"file":"/etc/palm/db/kinds/org.webosports.cdav.contactset"} Cannot
determine owner of db kind for /etc/palm/db/kinds/org.webosports.cdav.contactset
1970-01-14T03:25:38.426442Z [45] user.err configurator [] Configurator INVALID_JSON
{"MSGID":"CONFIGURATOR_ERROR", "CAUSE":"The json string is
wrong.","JSON":"{\"config\":\"{\n\t\"id\":
\"org.webosports.cdav.contactset:1\",\n\t\"sync\": false,\n\t\"indexes\":
[\n\t\t{\n\t\t\t\"name\": \"accountId\",\n\t\t\t\"props\": [ ..."}

[...]

Signed-off-by: Simon Busch <morphis@gravedo.de>