delete ebucketmigrator.erl

because nobody uses it

Change-Id: I64608dc6c2af51269f48c939cbdc3a4d06ecc995
Reviewed-on: http://review.couchbase.org/36881
Tested-by: Artem Stemkovski <artem@couchbase.com>
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
indentation fix

Change-Id: I49ac6d773850c90674d2a312c8411bad7781fac4
Reviewed-on: http://review.couchbase.org/36882
Tested-by: Artem Stemkovski <artem@couchbase.com>
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>