Mirror of FasterXML stax2-api#11

[smagill]

Mirror of FasterXML stax2-api#11
In the current implementation has not possible to write standalone attribute in writeStartDocument. This pull request fix it.

<?xml version='1.0' encoding='UTF-8' standalone='yes|no'?>

[sonatype-lift]

Persistent Bugs or Warnings (3)

1. RESOURCE_LEAK
   • At src/main/java/org/codehaus/stax2/io/Stax2FileResult.java(29,-1)
   • resource of type java.io.FileOutputStream acquired by call to constructOutputStream() at line 29 is not released after line 29.
2. RESOURCE_LEAK
   • At src/main/java/org/codehaus/stax2/io/Stax2FileSource.java(52,-1)
   • resource of type java.io.FileInputStream acquired by call to constructInputStream() at line 52 is not released after line 52.
3. RESOURCE_LEAK
   • At src/main/java/org/codehaus/stax2/io/Stax2URLSource.java(40,-1)
   • resource of type java.io.FileInputStream acquired by call to constructInputStream() at line 40 is not released after line 40.