Supply missing params.json.template in tests

Author: krivard

safegraph/tests/params.json.template

@@ -0,0 +1,12 @@
+{
+  "static_file_dir": "./static",
+  "raw_data_dir": "/mnt/data/safegraph/",
+  "export_dir": "./receiving",
+  "cache_dir": "./cache",
+  "n_core": "12",
+  "aws_access_key_id": "",
+  "aws_secret_access_key": "",
+  "aws_default_region": "",
+  "aws_endpoint": "",
+   "wip_signal" : ""
+}