Fix bug whereby the first file open was always logged to System.out.

Fix by opening only on demand so that managingTask can be set.


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@276788 13f79535-47bb-0310-9956-ffa450edef68

WHATSNEW

@@ -19,6 +19,10 @@ Fixed bugs:
 
 * <apply> was broken with classfilesets.  Bugzilla Report 30567.
 
+* The first file open that took place when using input files with the
+  <exec>, <apply>, or <java> tasks was always logged to System.out
+  instead of to the managing Task.
+
 Other changes:
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