Revise log related code

Revise log related code

- Rearrange log level.
enum MMCamcorderLogLevel {
	MM_CAMCORDER_LOG_LEVEL_CRITICAL = 0,
	MM_CAMCORDER_LOG_LEVEL_ERROR,
	MM_CAMCORDER_LOG_LEVEL_WARNING,
	MM_CAMCORDER_LOG_LEVEL_INFO,
	MM_CAMCORDER_LOG_LEVEL_DEBUG,
	MM_CAMCORDER_LOG_LEVEL_VERBOSE
};
- The default value is MM_CAMCORDER_LOG_LEVEL_INFO(3).
- Add new field to mmfw_camcorder.ini to control log level.
[General]
...
LogLevel = 3

[Version] 0.10.215
[Issue Type] Log feature

Change-Id: I055534ab7d8274e4df1f5d64ba8090c4adad2d63
Signed-off-by: Jeongmo Yang <jm80.yang@samsung.com>