1. add UT for import ODS 2. fix warning in source code when import ODS file
fix the assert failure
Merge branch 'master' of https://github.com/phpmyadmin/phpmyadmin into UT_pluginss
using OpenOffice ODS file for importing ods testing
Merge pull request #463 from adamgsoc2013/UT_pluginss

1. add UT for import ODS 2. fix warning in source code when import ODS file