Use os.rename for renaming
Use os.rename for renaming

'mv' is not a valid Windows system command.

Change-Id: I25116d6a22e8b664c99ca251231e05af2c97aeb2
Signed-off-by: Dan Mihai <ba8e1833495515b49ded9e20cae80a8129155aa9@microsoft.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/17703
Tested-by: jenkins-iotivity <d95b56ce41a2e1ac4cecdd398defd7414407cc08@iotivity.org>
Reviewed-by: Mats Wichmann <7a5e6f27299d2bbd9d04b59d9e8e4f8eab83d8cb@linux.com>
Reviewed-by: Gaganpreet Kaur <9f6eae8e193e7428e371b373aa39270b4eb31356@intel.com>
Reviewed-by: Phil Coval <ff46fec9739d31cce915aabcc3a7a2c00eee4d6c@osg.samsung.com>

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