[sonic_sku_create] Move tests from sonic-utilities-tests/ folder to tests/ folder (sonic-net#1222)

Move all files currently in sonic-utilities-tests folder to tests folder of sonic-utilities repository

Co-authored-by: Madhan Babu <madhan@arc-build-server.mtr.labs.mlnx>

Author: madhanmellanox

scripts/sonic_sku_create.py

@@ -1,4 +1,4 @@
-#! /usr/bin/env python2
+#!/usr/bin/python
 """
 usage: sonic_sku_create.py [-h] [-v] [-f FILE] [-m [MINIGRAPH_FILE]] [-b BASE]
                            [-r] [-k HWSKU]