Updated sample Chip Data file and documentation

Change-Id: I9d4a2e08f1b42a04a14d4388ff21638758fa1e0d
Signed-off-by: Zane Shelley <zshelle@us.ibm.com>
diff --git a/test/simulator/sample_data/chip_sample.xml b/test/simulator/sample_data/chip_sample.xml
new file mode 100644
index 0000000..8b0ca6e
--- /dev/null
+++ b/test/simulator/sample_data/chip_sample.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<chip model_ec="SAMPLE_10" name="Sample">
+    <attn_tree attn_type="CS" node_inst="0" root_node="GFIR"/>
+    <attn_tree attn_type="RE" node_inst="0" root_node="GFIR"/>
+</chip>