[7u6] RFR : 7161105 : unused classes in jdk7u repository

[Joe Wang]

In the patch for 7053556, the ObjectFactory/SecuritySupport classes that 
were duplicated in many packages were replaced by a unified set under 
xerces/internal/utils and xalan/internal/utils (Note that those under 
xpath/internal/utils were old). When the jaxp 1.4.5 source bundle was 
dropped however, it was a copy of the source bundle on top of the 
original source, therefore leaving these classes behind unremoved. This 
change request is to remove them (49 in total) from the repository.

webrev: http://cr.openjdk.java.net/~joehw/7u6/7161105/webrev/
Thanks,
Joe