Changes to accommodate client-go changes and kube vendor update

to v1.18.0

Signed-off-by: Humble Chirammal <hchiramm@redhat.com>

vendor/go.uber.org/zap/config.go

@@ -21,6 +21,7 @@
 package zap
 
 import (
+	"fmt"
 	"sort"
 	"time"
 
@@ -174,6 +175,10 @@ func (cfg Config) Build(opts ...Option) (*Logger, error) {
 		return nil, err
 	}
 
+	if cfg.Level == (AtomicLevel{}) {
+		return nil, fmt.Errorf("missing Level")
+	}
+
 	log := New(
 		zapcore.NewCore(enc, sink, cfg.Level),
 		cfg.buildOptions(errSink)...,