RFR: 8129572 - Cleanup usage of getResourceAsStream in jaxp

[Daniel Fuchs]

Hi,

Please find below a patch for

8129572 - Cleanup usage of getResourceAsStream in jaxp
https://bugs.openjdk.java.net/browse/JDK-8129572

http://cr.openjdk.java.net/~dfuchs/webrev_8129572/webrev.00/

This removes a bunch of unused getResourceAsStream methods
and sanitizes the few that remain.

I took the liberty to also add some additional debug traces
to the LSSerializerTest.java to help debug when the test fails.

best regards,

-- daniel