primitiveCreate is a write, not a read

DistributedFileSystem.java:

246   protected HdfsDataOutputStream primitiveCreate(Path f,
247     FsPermission absolutePermission, EnumSet<CreateFlag> flag, int bufferSize,
248     short replication, long blockSize, Progressable progress,
249     int bytesPerChecksum) throws IOException {
250     statistics.incrementReadOps(1);