* init_logger: switch from log-based to tracing-based and add compatibility layer
* Move tracing profiling subscriber related config realization
* sp-tracing: change profiling to be a layer instead of a subscriber
* Enable profiling layer in cli
* Change all test env_logger init to sp_tracing::try_init_simple
* Remove all local env_logger dependency
* Add missing tracing-subscriber dependency
* frame-sudo: fix tests
* frame-support: fix tests
* Fix frame/pallet and executor tests
* Fix the remaining tests
* Use subscriber's try_init as recommended by @davidbarsky
* Be explict that the tracing-log feature is needed
* Set subscriber writer to stderr
* Shorter line width
* Update cargo lock tracing version
* Fix sc_tracing crate compile
* Fix sc_authority_discovery crate test
* unremove default-features
* Leave enabled to default true
* Warn if global default cannot be set
* Fix unused import
* Remove unused PROXY_TARGET
* Change all reference from rc5 to rc6
* Change all reference of rc2 to rc6
* Fix styling
* Fix typo
* make logger init error'ing
* re-fixing the test issue
Co-authored-by: Benjamin Kampmann <ben@parity.io>
Wei Tang