D4 core server - version 1.2 released with sensor monitoring and filewatcher worker

v1.2 (2021-04-19)

Changes

• [filerwatcher] new worker to handle d4-goclient filewatcher meta-type [Jean-Louis Huynen]
• [Sensors monitoring] API to monitor offline sensors [Terrtia]
• [config] new variables [Terrtia]
• [Flask] change default host [Terrtia]
• [d4-core] change default max queue size [Jean-Louis Huynen]
• [client] no data: send empty D4 packet [Terrtia]

Fix

• [Flask] fix flask host [Terrtia]
• [Flask] typo [Terrtia]
• [UI sensor_register role] avoid login + fix error template [Terrtia]
• [UI change password] check user role [Terrtia]