RFR (JAXP) : 8046274: Removing dependency on jakarta-regexp

[huizhe wang]

Hi,

This change focuses purely on removing the dependency on 
jakarta-regexp.  I'm leaving all other things in the bcel code to a 
future bcel update.  All tests passed.

JBS: https://bugs.openjdk.java.net/browse/JDK-8046274
Webrev: http://cr.openjdk.java.net/~joehw/jdk9/8046274/webrev/

Thanks,
Joe