Allow testing memory to be set from test.py

Pass 8G to internal testing

Change-Id: Ib9b905f5dba541858814e1385da4763f685232eb
diff --git a/tools/internal_test.py b/tools/internal_test.py
index cb6e882..a0cc52b 100755
--- a/tools/internal_test.py
+++ b/tools/internal_test.py
@@ -58,7 +58,7 @@
 TEST_COMMANDS = [
     # Run test.py internal testing.
     ['tools/test.py', '--only_internal', '--slow_tests',
-     '--java_max_memory_size=12G'],
+     '--java_max_memory_size=8G'],
     # Ensure that all internal apps compile.
     ['tools/run_on_app.py', '--ignore-java-version','--run-all', '--out=out']
 ]