Fix up D7 packaging

Packaging is bailing because of 2 root causes.

D7 core migration does not take responsibility for moving rows from files to the files_managed table, that is up to the modules. This wasn't implemented for l10n_packager, so it is repackaging old releases. We should populate files_managed. japery is working on this.

This also shows an underlying issue, for some time in the past, distribution releases got recorded 3 times:

mysql> SELECT * FROM l10n_server_release WHERE pid = 30798 AND title = '7.x-1.0-rc1';
+--------+-------+-------------+-------------------------------------------------------------------------+------------+----------------------------------+-------------+--------+-----------+
| rid    | pid   | title       | download_link                                                           | file_date  | file_hash                        | last_parsed | weight | sid_count |
+--------+-------+-------------+-------------------------------------------------------------------------+------------+----------------------------------+-------------+--------+-----------+
| 354463 | 30798 | 7.x-1.0-rc1 | http://ftp.drupal.org/files/projects/cartaro-7.x-1.0-rc1.tar.gz         | 1373029856 | 629678b98c983bc3fcabb1ac397a887d |  1373030284 |      0 |        35 |
| 354468 | 30798 | 7.x-1.0-rc1 | http://ftp.drupal.org/files/projects/cartaro-7.x-1.0-rc1-no-core.tar.gz | 1373029878 | 458f4aa4cc9ed9ce6e42b1c84c23f5ff |  1373032215 |      0 |      5149 |
| 354473 | 30798 | 7.x-1.0-rc1 | http://ftp.drupal.org/files/projects/cartaro-7.x-1.0-rc1-core.tar.gz    | 1373029889 | 8c5aaf0af4dfcb13e2308267d73014a1 |  1373034848 |      0 |      9463 |
+--------+-------+-------------+-------------------------------------------------------------------------+------------+----------------------------------+-------------+--------+-----------+
3 rows in set (0.00 sec)

The -no-core and -core rows should not be there, as they are causing duplicate rows. I am working on this.