swarm/storage: Support for uploading 100gb files (#1395)

* swarm/storage: Fix gouroutine leak while uploading large files
* swarm/storage: Fix pyramid chunker to wrap properly level3 and above

storage/hasherstore_test.go

@@ -42,8 +42,9 @@ func TestHasherStore(t *testing.T) {
 	}
 
 	for _, tt := range tests {
+
 		chunkStore := NewMapChunkStore()
-		hasherStore := NewHasherStore(chunkStore, MakeHashFunc(DefaultHash), tt.toEncrypt, chunk.NewTag(0, "test-tag", 0))
+		hasherStore := NewHasherStore(chunkStore, MakeHashFunc(DefaultHash), tt.toEncrypt, chunk.NewTag(0, "test-tag", 2))
 
 		// Put two random chunks into the hasherStore
 		chunkData1 := GenerateRandomChunk(int64(tt.chunkLength)).Data()