Replace all rlog occurrences with the shared logger (#350)

* Replace all `rlog` occurrences with the shared logger

* Use the same log format in `InitLoggerStderrOnly` as well

* Convert one more `log.Fatal` to `logger.Log.Errorf` as well in the `cli`

* Replace `log.` occurrences with `logger.Log.` in `agent`

* Fix `cannot use err (type error)`

* Change the logging level to `DEBUG`

* Replace an `Errorf` with `Fatal`

* Add informative message

cli/uiUtils/confirmation.go

@@ -3,9 +3,10 @@ package uiUtils
 import (
 	"bufio"
 	"fmt"
-	"log"
 	"os"
 	"strings"
+
+	"github.com/up9inc/mizu/shared/logger"
 )
 
 func AskForConfirmation(s string) bool {
@@ -15,7 +16,7 @@ func AskForConfirmation(s string) bool {
 
 	response, err := reader.ReadString('\n')
 	if err != nil {
-		log.Fatal(err)
+		logger.Log.Fatalf("Error while reading confirmation string, err: %v", err)
 	}
 	response = strings.ToLower(strings.TrimSpace(response))
 	if response == "" || response == "y" || response == "yes" {