Support change of loglevel per Runtime without restarting KIM

[tobiscr]

Description

For debugging purposes it is helpful to enable the debug-log for a particular runtime. KIM should be able to change the log-level (e.g. to DEBUG or TRACE) for all log-messages generated during the reconciliation of a paritcular RuntimeCR.

AC:

• An annotation is added to the RuntimeCR which indicates that KIm should use a particular log-level for this runtime
• KIM is at the beginning of the reconciliation of a RuntimeCR checking the loglevel-label defined the RuntimeCR. If not loglevel-label is set, its using the configured default-loglevel. Otherwise, the logger is using the defined loglevel.

Reasons

Changing loglevels for a paritcular runtime can simplify the debugging process.

Attachments

[tobiscr]

Relates to #402

[tobiscr]

Could be covered by https://github.com/stakater/Reloader