Rewrite is to use only string manipulation as converting to Int removes leading zeros.

fixes #9769

 - separate conf num with space instead of dash

 Initial work on more flexible formatting is being done in
  https://github.com/ritzalam/bigbluebutton/tree/format-voice-conf-number

 This just addresses complaints on mailing list that separating using '-'
 is confusing.

 - fix filename regex
 - create download flag when uploading file with that can be downloaded

 - verify presentation and meeting id formats
 - construct presentation file path making sure that they are valid
 - add "downloadable" flag to check if presentation can be downloaded or not
 - collect presentation upload errors so we can send to the client in the future

 - add dashes to conference numbers so it is easier to read

* getNotEndedMeetingWithTelVoice()
* getNotEndedMeetingWithWebVoice()

 - addjust timeouts