Update webadmin_utils.py

Changed to http://downloads.openmicroscopy.org/latest/omero/ as per Andrew's suggestion.
History page and Basket uses thumbnail?verision
Share icon page uses thumbnail?verision
Fix typo in method name.
Use the 32-bit strategy for 32bit test.
Fix test to match full range.
Rename test
adding handler to the long lines in the description
Fix format string in Quanitization
Assign some have way reasonable maxFileSize in FileParser
Longer timeout on rendering test
Rename usage helper methods.
Fix PasswordTest
Up timeout for SelfCorrectingDB test
BROKEN: more tests to look into
Fix CurrentDetails NoSuchElement errors
Reduce SessionCacheTest wait times
Minor warning fix
Reduce the Renderer loops to prevent timeouts
Allow no args and have that return current user's usage.