Change log-level for better performance and less annoying logs (#1231)

This PR removes not so useful logs and changes most of Info level
log to Debug/Error level in hot path while preserving some of them
that is helpful for troubleshooting.

pkg/controller/api.go

@@ -34,7 +34,6 @@ import (
 	ferror "github.com/fission/fission/pkg/error"
 	"github.com/fission/fission/pkg/fission-cli/logdb"
 	"github.com/fission/fission/pkg/info"
-	"github.com/fission/fission/pkg/utils"
 )
 
 var podNamespace string
@@ -274,7 +273,6 @@ func (api *API) Serve(port int) {
 	address := fmt.Sprintf(":%v", port)
 
 	api.logger.Info("server started", zap.Int("port", port))
-	r.Use(utils.LoggingMiddleware(api.logger))
 	err := http.ListenAndServe(address, r)
 	api.logger.Fatal("done listening", zap.Error(err))
 }