RFR(JAXP): 8165784: Deprecate the internal Catalog API in JDK 9

[Joe Wang]

Hi,

Please review the deprecation of the internal Catalog API.

JBS: https://bugs.openjdk.java.net/browse/JDK-8165784
webrev: http://cr.openjdk.java.net/~joehw/jdk9/8165784/webrev/

Thanks,
Joe