Remove file-name-casing rule for tests

Author: cbrevik

types/tslint.json

@@ -5,6 +5,7 @@
     "indent": [true, "spaces"],
     "no-redundant-jsdoc": false,
     "no-unnecessary-class": false,
-    "interface-name": false
+    "interface-name": false,
+    "file-name-casing": false
   }
 }