RFR: JDK-8223942: Missing methods in ClientCodeWrapper$WrappedJavaFileManager

[Vicente Romero]

Please review fix for [1] at [2]. Some methods in 
javax.tools.JavaFileManager and javax.tools.StandardJavaFileManager were 
not overriden by wrapper classes provided at 
com.sun.tools.javac.api.ClientCodeWrapper. The fix is adding the missing 
methods plus providing a test to future check issues for the 
corresponding wrapping classes in the future. The test doesn't cover 
other wrapping classes. That could be achieve as an additional RFE if 
needed,

Thanks,
Vicente

[1] https://bugs.openjdk.java.net/browse/JDK-8223942
[2] http://cr.openjdk.java.net/~vromero/8223942/webrev.00/