HLT met mon Mar 2021 update

HLT MET monitoring chain name changes to include all 2015 - 2018 unprescaled chains.

This merge request affects 1 package:

• Trigger/TrigMonitoring/TrigMETMonitoring

This merge request affects 3 files:

• Trigger/TrigMonitoring/TrigMETMonitoring/python/TrigMETMonitCategory.py
• Trigger/TrigMonitoring/TrigMETMonitoring/python/TrigMETMonitorAlgorithm.py
• Trigger/TrigMonitoring/TrigMETMonitoring/src/TrigMETMonitorAlgorithm.cxx

Adding @khamano as watcher

added DQ JetEtmiss Trigger master review-pending-level-1 labels

CI Result SUCCESS (hash aa480469)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis	DetCommon
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
AthAnalysis: number of compilation errors 0, warnings 0
DetCommon: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 30775]

mentioned in merge request !42075 (merged)

added review-approved label and removed review-pending-level-1 label

merged

mentioned in commit 117ae8fa

added sweep:ignore label