Added new ${DATADIR} that points to atest/testdata directory to ease referencing files under that dir. Also little cleanup.
Added new ${DATADIR} that points to atest/testdata directory to ease referencing files under that dir. Also little cleanup.

Senseg/robotframework,Senseg/robotframework,userzimmermann/robotframework-python3,userzimmermann/robotframework-python3,Senseg/robotframework,userzimmermann/robotframework-python3,userzimmermann/robotframework-python3,userzimmermann/robotframework-python3,Senseg/robotframework,Senseg/robotframework