Set default value for miniomaha server config file

For most cases, we use miniomaha.conf as miniOmaha server configuration file.
Let's set this as the default value.

BUG=chrome-os-partner:10457
TEST=Start miniomaha.py from two different working directories without config
     file specified.

Change-Id: I75bf8cc36908902686b9899d418c6970d524291c
Reviewed-on: https://gerrit.chromium.org/gerrit/25159
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Commit-Ready: Vic Yang <victoryang@chromium.org>
Tested-by: Vic Yang <victoryang@chromium.org>
1 file changed
tree: d29eb61b990c8607f82cc6bcb5bf7401ebcf28db
  1. .gitignore
  2. OWNERS
  3. cros_bundle/
  4. factory_setup/