fixes #732 update_bbb_room called after update a space was sending the wrong param name, the param is called private in bigbluebutton_room model and called public in space model
Merge remote-tracking branch 'origin/bug732'
Make sure all rooms have passwords when created

A room without password can cause errors when it is updated in case it is
private. Better have passwords all the time.
BigbluebuttonRails was updated to prevent errors in this case.
Merge branch 'master' into recordings