Added brakeman to running tests and added a silencer for secret key

config/brakeman.ignore

@@ -0,0 +1,22 @@
+{
+  "ignored_warnings": [
+    {
+      "warning_type": "Session Setting",
+      "warning_code": 29,
+      "fingerprint": "715ad9c0d76f57a6a657192574d528b620176a80fec969e2f63c88eacab0b984",
+      "check_name": "SessionSettings",
+      "message": "Session secret should not be included in version control",
+      "file": "config/initializers/secret_token.rb",
+      "line": 15,
+      "link": "https://brakemanscanner.org/docs/warning_types/session_setting/",
+      "code": null,
+      "render_path": null,
+      "location": null,
+      "user_input": null,
+      "confidence": "High",
+      "note": "This is an environment variable for production and embedded for test and dev"
+    }
+  ],
+  "updated": "2018-05-03 17:15:51 +0000",
+  "brakeman_version": "4.2.1"
+}