Added test for nested FlatBuffers functionality.

Also fixed that the parsing test wasn't calling the buffer
testing function.

Change-Id: I5baae071bf0832c7797b4ef1d19d9b015e3ff5bc
Tested: on Linux.

tests/monsterdata_test.golden

@@ -6,8 +6,8 @@
     test1: 3,
     test2: Green,
     test3: {
-      a: 5,
-      b: 6
+      a: 10,
+      b: 20
     }
   },
   hp: 80,
@@ -17,7 +17,12 @@
     1,
     2,
     3,
-    4
+    4,
+    5,
+    6,
+    7,
+    8,
+    9
   ],
   test_type: Monster,
   test: {
@@ -34,8 +39,22 @@
     }
   ],
   testarrayofstring: [
-    "test1",
-    "test2"
+    "bob",
+    "fred",
+    "bob",
+    "fred"
+  ],
+  testarrayoftables: [
+    {
+      hp: 1000,
+      name: "Barney"
+    },
+    {
+      name: "Fred"
+    },
+    {
+      name: "Wilma"
+    }
   ],
   testhashs32_fnv1: -579221183,
   testhashu32_fnv1: 3715746113,