Story SW-300: fixes in raw test parser when it founds corresponding error in tile and rcu

.gitattributes

LCU/Maintenance/DBInterface/monitoringdb/models/rtsm.py

LCU/Maintenance/DBInterface/monitoringdb/serializers/rtsm.py

...nance/DBInterface/monitoringdb/station_test_raw_parser.py

LCU/Maintenance/DBInterface/monitoringdb/tests/common.py

...ce/DBInterface/monitoringdb/tests/t_stationtest_parser.py

...rface/monitoringdb/tests/test_generic_stationtestdata.csv

...nitoringdb/tests/test_multiple_tileerror_and_rcuerror.csv

LCU/Maintenance/DBInterface/monitoringdb/urls.py

LCU/Maintenance/DBInterface/monitoringdb/views/rtsm_views.py