TagsPlugin: fixed a syntax error in unit tests with Python 2.4 (refs #11147)


git-svn-id: http://trac-hacks.org/svn/tagsplugin/trunk@13417 7322e99d-02ea-0310-aa39-e9a107903beb
TagsPlugin: avoid `OperationalError: no such table: tags` while running unit tests (refs #11147)


git-svn-id: http://trac-hacks.org/svn/tagsplugin/trunk@13418 7322e99d-02ea-0310-aa39-e9a107903beb
TagsPlugin: fixed an `IntegrityError` while syncing ticket fields and tags table on concurrent access (refs #11147)


git-svn-id: http://trac-hacks.org/svn/tagsplugin/trunk@13419 7322e99d-02ea-0310-aa39-e9a107903beb