Added a system property to set the timezone when running tests to Pacific/Auckland

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@11195 e0a1b77d-ad91-4216-81b1-defd5f83fa92
Added a system property to set the timezone when running tests to Pacific/Auckland

git-svn-id: https://svn.cms.waikato.ac.nz/svn/weka@11196 e0a1b77d-ad91-4216-81b1-defd5f83fa92