mv_machine_learning: rename file names

mv_machine_learning: rename file names

[Issue type] code clean

Rename file names of mv_machine_learning according to Tizen coding style
document.[1]

Below are rules used in this patch,
	  - Class module refered by external modules uses "NanespaceClassname.*"
	  - Class module used internally uses "Classname.*"
	    . If "Classname" is duplicated with other task group then sub directory
		  name can be added as a prefix.
	  - Non class file referred by external modules uses "namespace_filename.*"
	  - Non class file used internally uses "filename.*"
	    . If "filename" is duplicated with other task group then sub directory
		  name can be added as a prefix.

[1] https://wiki.tizen.org/Native_Platform_Coding_Idiom_and_Style_Guide

Change-Id: I0fe3a95a1b5b88b294e2d00ad1fe489143d6cd7d
Signed-off-by: Inki Dae <inki.dae@samsung.com>