Resolve L2SS-1455 "Change angle to radians"

README.md

tangostationcontrol/VERSION

...tegration_test/default/devices/test_device_digitalbeam.py

...tegration_test/default/devices/test_device_observation.py

.../integration_test/default/devices/test_device_tilebeam.py

...t/digitalbeam_performance/test_digitalbeam_performance.py

...on_test/tilebeam_performance/test_tilebeam_performance.py

...stationcontrol/devices/base_device_classes/beam_device.py

...stationcontrol/tangostationcontrol/devices/observation.py

...tangostationcontrol/test/devices/test_observation_base.py

tangostationcontrol/test/beam/test_delays.py

...tationcontrol/test/devices/sdp/test_digitalbeam_device.py