[8u] RFR 8055705: Rename UnixPrintServiceLookup and Win32PrintServiceLookup as a platform neutral class name

[Zhengyu Gu]

Hi,

Please review this backport to 8u. The patch applied largely clean after 
file path changes. But instead of using platform-dependent META-INFO 
service configuration file, I kept old mechanism to avoid pulling in 
more changesets, and updated service configuration in following files:

src/solaris/classes/sun/print/services/javax.print.PrintServiceLookup
src/windows/classes/sun/print/services/javax.print.PrintServiceLookup

JDK9 bug: https://bugs.openjdk.java.net/browse/JDK-8055705
Original patch: http://hg.openjdk.java.net/jdk9/client/jdk/rev/8278952344bc

JDK8u backport: http://cr.openjdk.java.net/~zgu/JDK-8055705-8u/webrev.00/

Thanks,

-Zhengyu