rebase: vendor dependencies for Vault API

Uses github.com/libopenstorage/secrets to communicate with Vault. This
removes the need for maintaining our own limited Vault APIs.

By adding the new dependency, several other packages got updated in the
process. Unused indirect dependencies have been removed from go.mod.

Signed-off-by: Niels de Vos <ndevos@redhat.com>

vendor/go.uber.org/zap/options.go

@@ -20,11 +20,7 @@
 
 package zap
 
-import (
-	"fmt"
-
-	"go.uber.org/zap/zapcore"
-)
+import "go.uber.org/zap/zapcore"
 
 // An Option configures a Logger.
 type Option interface {
@@ -111,16 +107,3 @@ func AddStacktrace(lvl zapcore.LevelEnabler) Option {
 		log.addStack = lvl
 	})
 }
-
-// IncreaseLevel increase the level of the logger. It has no effect if
-// the passed in level tries to decrease the level of the logger.
-func IncreaseLevel(lvl zapcore.LevelEnabler) Option {
-	return optionFunc(func(log *Logger) {
-		core, err := zapcore.NewIncreaseLevelCore(log.core, lvl)
-		if err != nil {
-			fmt.Fprintf(log.errorOutput, "failed to IncreaseLevel: %v", err)
-		} else {
-			log.core = core
-		}
-	})
-}