RFR: 8149601 Update references from "1.9" to "9"

[Iris Clark]

Hi.

Please review the following changes to the jaxp and jdk 
repositories to fix a few additional references to "1.9".

Bug

  8149601 Update references from "1.9" to "9"
  https://bugs.openjdk.java.net/browse/JDK-8149601

Webrev

  http://cr.openjdk.java.net/~iris/verona/8149601/webrev/

This is a follow-up to JDK-8136494 which changed "@since 1.9" 
to "@since 9" matching java.specification.version.

Thanks,
iris