tree b6152eabfbd5560291abbfb54b11320f7c0ddc00
parent d4e4356a612c6aefa41c0bea467d863ffb3120ce
author YoungSeok Yoon <youngseokyoon@google.com> 1466558099 -0700
committer YoungSeok Yoon <youngseokyoon@google.com> 1466614412 -0700

feat(config): migrate old config files to the new format

In commit 178b658, the old config files, "nicknames" and "users", were
merged into a single "config" file. From this CL, when madb sees the
old config files, it migrates those files into the new "config" file
so that the user doesn't lose all the nicknames and user IDs when
upgrading madb to a new version.

Change-Id: I6f376986dd55211729d0a5eb70dc885d26a93d9d