fixed few issues with disk ltm

...rmem/server/ltm/base/converter/image/png/PngConverter.cpp

...rver/ltm/base/extractor/imageExtractor/ImageExtractor.cpp

...server/ltm/base/extractor/imageExtractor/ImageExtractor.h

...botAPI/libraries/armem/server/ltm/disk/EntitySnapshot.cpp

source/RobotAPI/libraries/armem/server/ltm/disk/Memory.cpp

source/RobotAPI/libraries/armem/server/ltm/disk/Memory.h

...PI/libraries/armem/server/ltm/disk/detail/DiskStorage.cpp

...tAPI/libraries/armem/server/ltm/disk/detail/DiskStorage.h

...PI/libraries/armem/server/plugins/ReadWritePluginUser.cpp

...tAPI/libraries/armem/server/plugins/ReadWritePluginUser.h