Fix legends on some graphs on git dashboard
Fix legends on some graphs on git dashboard

The gauges have a longer metric name and the 'node' component is
in component 4, not 3.

Change-Id: I2996f4e257e3374764be1d4179e2f9aa2e4649f9

dongwenjuan/project-config,noorul/os-project-config,Tesora/tesora-project-config,noorul/os-project-config,openstack-infra/project-config,openstack-infra/project-config,Tesora/tesora-project-config,dongwenjuan/project-config