Merge branch 'merge-polling-with-master' of github.com:bigbluebutton/bigbluebutton into merge-polling-with-master

Recording updates merge

 - fix raise condition between setting the user has joined the voice conf and the joined voice event

 - don't throw exception when external userid is not found as the user might have acutally left the meeting

The 'mkclean' tool reorganizes the encoded webm file to optimize it for
streaming. In particular, it moves the index to the start of the file.

This fixes streaming in Chrome, which otherwise had a very long delay
before playback started since it downloaded until it saw the index
before it started playback.

This needs a new dependency added to the bbb-record-core package to
pull in the mkclean tool.

In some cases, it was attempting to create a status file in a directory
that did not exist yet.

   which kills our message processor

Merge branch 'merge-polling-with-master' of github.com:bigbluebutton/bigbluebutton into merge-polling-with-master

reverted jssip back to 0.3.7 and fixed chrome webrtc

I had it on DEBUG temporarily for testing. The old version used ERROR,
but this made it print virtually no output which made diagnosing
issues difficult.

It's now done in an order that should be less likely to cause
issues with a concurrent rap-worker process, and the files
deleted by --delete and --delete-all are now the same.

The ffmpeg binary should be looked up using the normal PATH mechanism,
it might not always be installed in the same place.

The new rap worker relies only on .done files for triggering, rather
than the absence of process/publish directories.

It now does much less directory reading, and performance should
scale far better with large numbers of recordings.

Semantics should be mostly unchanged, but there's greater use
of '.fail' files to mark errors, and '.done' files are now removed
after all of the following processing steps complete.

The rap worker no longer relies on processing scripts leaving
behind empty directories; those are now removed where appropriate.

 - add test for non-GA version (1.7.0_65-b19)

Fix java detection exception