Metadata don't send if you append as CMSampleBuffer

[andrew3213221]

Describe the bug
RTMP stream
Metadata don't send if you append as CMSampleBuffer

To Reproduce
Steps to reproduce the behaviour:
connect to RTMP server and use input as sample buffer
RTMPStream.appendSampleBuffer(CMSampleBuffer, AVMediaType)
the problem is when message with data send
use function createMetaData which check if input device was used
but appendSampleBuffer doesn't set input device as function attachCamera

Expected behavior
When you use own capture session with output metadata must be included also

Desktop (please complete the following information):

• OS: iOS
• Version 1.1.6

[shogo4405]

I have no good idea. Please override RTMPStream.

class YourRTMPStream: RTMPStream {
    override func createMetadata() -> ASObject  {
           ...
    }
}

#1074

Close as wontfix.