Adds pupeteer test to join as two users and check if one can see the other

adds getMetrics() after checkForOtherUser and currentTimestamp to the metrics fileName and some fixes

Add debounce to mute/unmute button

Fixes media rerender

Fix bottom clip in first chat message

Merge 2.2 into master

Merge branch 'v2.2.x-release' of github.com:bigbluebutton/bigbluebutton into feb14-merge-2.2-into-master

Pulled HTML5 locales Feb 14, 2020; Added Thai

Add health check for akka fsesl

 - clean up
 - bind to port 8900

 - bind only to localhost

Merge branch 'v2.2.x-release' of github.com:bigbluebutton/bigbluebutton into add-health-check-for-akka-fsesl

 Track call session state

 The /healthz returns information is we are able to send and receive message to/from freeswitch.
 The /status returns information about freeswitch version and uptime.

Several fixes for the external video module

removed overwriting in page.js and specified User2 as a specific username to use in the second session with user/multiusers.js

Fix panel resize when first loading in RTL