fix(tiller): increase maximum size of gRPC message

* tiller_fix_2261

* fix(tiller) 2261 Increase maxMsgSize to 20MB

pkg/tiller/server.go

@@ -28,9 +28,9 @@ import (
 	"k8s.io/helm/pkg/version"
 )
 
-// maxMsgSize use 10MB as the default message size limit.
+// maxMsgSize use 20MB as the default message size limit.
 // grpc library default is 4MB
-var maxMsgSize = 1024 * 1024 * 10
+var maxMsgSize = 1024 * 1024 * 20
 
 // DefaultServerOpts returns the set of default grpc ServerOption's that Tiller requires.
 func DefaultServerOpts() []grpc.ServerOption {