Release version 1.19.2

Release version 1.19.2

Changes:
 - Fix a bug on processing system packages
 - Add dynamic loading for app2ext library
 - Revert "Check if in uninstalled app dirs are mounted files"
 - Set system_share group on data dirs when new user added
 - Add plugin parser infos
 - Revert "Set User::Home label to shared/res of wgt package"
 - Reducing unnecessary code
 - Update app root path when switching readonly mode

Change-Id: I167e0110a6329ec39761f4d72565725009da655b
Signed-off-by: Junghyun Yeon <jungh.yeon@samsung.com>