configure JAVA_HOME setting for Ant task

[Matthew Good <trac@…>]

This patch allows users to put the path of their JAVA_HOME in the slave config and sets it when running the ant task:

bitten/build/javatools.py

@@ -26 +26 @@
     if ant_home:
         executable = os.path.join(ant_home, 'bin', 'ant')
 
+    java_home = ctxt.config.get_dirpath('java.home')
+    if java_home:
+        os.environ['JAVA_HOME'] = java_home
+
     logfile = tempfile.NamedTemporaryFile(prefix='ant_log', suffix='.xml')
     if args:
         args = shlex.split(args)

[cmlenz]

Patch applied in [312].