Refactor logging to provide common logger from LoggerAdapter (#2478)

* Refactor logging to provide common logger from LoggerAdapter

Move logger logic de WinstonLoggerAdapter

Further improvements in configuration

Use logger instead of getLogger

- Removes PLog module

Reverts name changes

nits

* Adds additional logging levels as requirements

* Adds tests for logging configuration

* removes flaky test

* investigate...

* further investigation

* Adds silent option to disable console output

* Restores logs with VERBOSE in tests

* Expose controller instead of adapter, reduces method requirements for adapter

* Shuffles initializations around

* Fix doc

* Load cloudCode last to make sure the logger is available

* Adds test to make sure we can load an adapter from npm module

* extract defaults

* Adds defaultMongoURI to defaults

* fix defaults values

* Proper error for PG failures

* Disable flaky test

src/Routers/FunctionsRouter.js

@@ -65,7 +65,7 @@ export class FunctionsRouter extends PromiseRouter {
         master: req.auth && req.auth.isMaster,
         user: req.auth && req.auth.user,
         installationId: req.info.installationId,
-        log: req.config.loggerController && req.config.loggerController.adapter,
+        log: req.config.loggerController,
         headers: req.headers,
         functionName: req.params.functionName
       };