different name given to the internal download load file name

File name from promoted location is : tzupdater-1.2.1-2007f.zip
File name from internal web location is : tzupdater-1_2_1-2007f.zip

promoted location : /java/re/tzupdater/1.2.1/promoted/fcs/b01/bundles
Web location : http://jscpreview.sfbay/javase/downloads/index.jsp

'.' is replaced with '_' in the file name.

Please close the bug if you have any proper justification for the same.