[bug] storage size test added

Everyone,

I missed one test in storage size for XML which was *ITS:SPAN* this test
has now been added to storage size and the test suite dashboard
http://htmlpreview.github.com/?https://raw.github.com/finnle/ITS-2.0-Testsuite/master/its2.0/testSuiteDashboard.html#StorageSize
has
been updated to reflect this update. Just a heads up to people testing
this data category.

Thanks,
Leroy