RFR (JAXP): 8147051: StaxEntityResolverWrapper should create StaxXMLInputSource with a resolver indicator

[huizhe wang]

Happen to notice that the indicator that the source was created by a 
resolver was not set in StaxEntityResolverWrapper. Also, it's 
"IsCreatedByResolver" rather than "hasResolver".

JBS: https://bugs.openjdk.java.net/browse/JDK-8147051

webrev: http://cr.openjdk.java.net/~joehw/jdk9/8147051/webrev/

Thanks,
Joe