RFR (JAXP) 8058152: JDK accepts XSLT stylesheet having import element erroneously placed

[Joe Wang]

Hi,

Please review a change to validate that xsl:import element children 
/must precede/ all other element children of an <xsl:stylesheet> 
element, including any </xsl/:/include/> element children as required by 
the specification [1].

[1] https://www.w3.org/TR/xslt#import

JBS: https://bugs.openjdk.java.net/browse/JDK-8058152
webrev: http://cr.openjdk.java.net/~joehw/jdk9/8058152/webrev/

Thanks,
Joe