Differing label names hinder use of inhibition rules

[junnae]

To make use of inhibition rules in alertmanager, label names should be consistent across metrics.
Config
For example, the application name is now called "app", "log_app", "container" depending on the metrics you use.
While there is some logic behind this (eg. "app" being the app producing the logging metrics), we should in theory be able to leverage smarter alerting rules by being able to inhib restart alerts if an app is down.

See this issues