runUnitTest: Backport d4c2e1c3 from generic ERP5 for 'runUnitTest: ZODB is removed on '--save', so also recreate the Catalog tables installed by bt5s.'.

Author: Kazuhiko Shiozaki <kazuhiko@nexedi.com>
Date:   Thu Feb 4 10:35:33 2016 +0100

    ERP5TypeTestCase: reduce needless ERP5Site_reindexAll call in setUpERP5Site().

    ERP5Site_reindexAll is now called only once when --recreate_catalog=1 is explicitly specified.
    Also manage_catalogClear is not called with --load unless --recreate_catalog=1 is explicitly specified.