drop report temp tables on db clean up.
This helps where TEMPORARY tables are a bit limiting due to their join restrictions or the desire to retain them for when the data doesn't go stale that quickly
--webtest for CRM-12284
CRM-12367
CRM-12151

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* CRM-12151: MySQL max_key_length error installing CiviCRM 4.2.8 on stock OSX MySQL
  http://issues.civicrm.org/jira/browse/CRM-12151
Merge pull request #455 from eileenmcnaughton/4.3

drop report temp tables on db clean up.
Fix for CRM-12362
Merge pull request #464 from deepak-srivastava/galaxy

Fix for CRM-12362
Merge pull request #462 from pratik-joshi/forum_upgrade_issue

CRM-12367 : http://forum.civicrm.org/index.php/topic,28397.msg121403.html#msg121403
Merge pull request #463 from dlobo/CRM-12151

CRM-12151
Merge pull request #461 from pradpnayak/CRM-12284

--webtest for CRM-12284