Set default level of log print + Clean up environment variables

Set default level of log print + Clean up environment variables

Define all environment values what dali-adaptor internally used at internal header.
+
Set level of DALI_LOG_~~~ as environment value
Now we can ignore DALI_LOG_DEBUG_INFO at ubuntu platform.

Change-Id: Ib564e442f457e475e526407f3872ed8d0965da45
Signed-off-by: Eunki, Hong <eunkiki.hong@samsung.com>