fix issues with ndjson composite mask (#1441)

Fix some issues with composite mask examples

Author: ovalle15

examples/annotation_import/image.ipynb

@@ -108,7 +108,7 @@
     {
       "metadata": {},
       "source": [
-        "API_KEY = \"\"\n",
+        "API_KEY =\"\"\n",
         "client = lb.Client(API_KEY)"
       ],
       "cell_type": "code",
@@ -569,41 +569,17 @@
         "  )\n",
         "\n",
         "\n",
-        "# NDJSON using instanceURI, or bytes array - use one of the two options\n",
+        "# NDJSON using bytes array\n",
         "cp_mask_ndjson = []\n",
         "\n",
-        "for color in colors:\n",
-        "  if color in rgb_colors_for_mask_with_text_subclass_tool:\n",
-        "    cp_mask_ndjson.append({\n",
-        "      \"name\": \"mask_with_text_subclass\",\n",
-        "      \"mask\": {\"instanceURI\": cp_mask_url,\n",
-        "      \"colorRGB\": color },\n",
-        "      \"classifications\":[{\n",
-        "        \"name\": \"sub_free_text\",\n",
-        "        \"answer\": \"free text answer\"\n",
-        "      }]\n",
-        "    }\n",
-        "  )\n",
-        "  else:\n",
-        "    cp_mask_ndjson.append({\n",
-        "          \"name\": \"mask\",\n",
-        "          \"classifications\": [],\n",
-        "          \"mask\": {\n",
-        "            \"instanceURI\": cp_mask_url,\n",
-        "            \"colorRGB\": color\n",
-        "      }\n",
-        "    }\n",
-        "  )\n",
-        "\n",
-        "\n",
         "#Using bytes array.\n",
         "response = requests.get(cp_mask_url)\n",
         "im_bytes = base64.b64encode(response.content).decode('utf-8')\n",
         "for color in colors:\n",
         "  if color in rgb_colors_for_mask_with_text_subclass_tool:\n",
         "    cp_mask_ndjson.append({\n",
         "      \"name\": \"mask_with_text_subclass\",\n",
-        "      \"mask\": {\"instanceURI\": im_bytes,\n",
+        "      \"mask\": {\"imBytes\": im_bytes,\n",
         "      \"colorRGB\": color },\n",
         "      \"classifications\":[{\n",
         "        \"name\": \"sub_free_text\",\n",
@@ -616,7 +592,7 @@
         "          \"name\": \"mask\",\n",
         "          \"classifications\": [],\n",
         "          \"mask\": {\n",
-        "            \"instanceURI\": im_bytes,\n",
+        "            \"imBytes\": im_bytes,\n",
         "            \"colorRGB\": color\n",
         "      }\n",
         "    }\n",