This change introduces a config file
`/etc/bigbluebutton/bbb-apps-akka.conf` which reads the default config
from packages and allows operators to keep their own config file changes
across package upgrades. This removes the workaround of copying the
config file to /tmp in preinst and then extracvting API URI and secret
and then in postinst inject it back to the config file in /usr/share

If the config file in /usr does not have the "changeme" secret, then API
URI and secret are extracted and injected to the generated file /etc, so
packages would upgrade in a clean way.

The postrm script removes the config file in /etc if the package is
purged but not if it is just uninstalled.

bbb-install and bbb-conf must reflect this change and replace the API
secret and URL in /etc, not /usr/share

Include registeredOn date in pubSub user creation messages to replace loginTime creation in Meteor

Split Meteor roles backend-frontend revisit

Merge branch '2.3-alpha5-with-split-meteor-roles-10349' of github.com:antobinary/bigbluebutton into 2.3-alpha5-with-split-meteor-roles-10349

Fix 'data-test' values for chat messages

multiple automated tests suites updates + add missing polling specs and move them with old ones to a polling test suite (#10766)

* updating old tests + collecting more snapshots [WIP]

* updates old test suites and collects more visual regressions screenshots

* remove snapshots and their collection temporary

* run tests from packages.json

* update test execution command/export constants from .env to core/constants.js

* update tests/puppeteer/README.md file

* update LOOP_INTERVAL variable call and assign timeouts to the webcam share spec

* redefine waitForSelector func in page.js, update chat test suite specs and add poll chat message test spec

* Merge remote-tracking branch 'upstream/develop' into updating-old-tests-visual-with-visual-regressions

* update webcam test specs collecting videoPreviewTimeout and use it to wait for videoPreview selector

* update custom parameters test suite

* update breakout test suite

* update webcam layout test suite

* update multiusers test suite

* update notifications test suite

* update presentation test suite

* whiteboard test suite

* screenshare test suite

* update sharednotes test suite

* user ELEMENT_WAIT_TIME variable from timeouts constants.js

* list TEST CONSTANTS by category

* add poll test suite and assigns the right unassigned timeouts

* set test pages to headless

Merge branch 'develop' of github.com:bigbluebutton/bigbluebutton into 2.3-alpha5-with-split-meteor-roles-10349

Fix user-list-item dropdowns breaking on mobile screen sizes

Store the changed and default settings in different variables

Removes loginTime creation from Meteor and use the registeredOn date created on Akka. Makes Akka send the registeredOn date throught PubSub messages: UserRegisteredRespMsg, GuestsWaitingForApprovalEvtMsg and ValidateAuthTokenRespMsg.

Show uploaded slides from other users

Added STUN check

Chat with adapter and context 

fix inserts userId to the EndMeeting function calls.

Fixes interruption of webcam, external video and screenshare when user changes language settings

User role is incorrect after client reconnect.

fix for issue: https://github.com/bigbluebutton/bigbluebutton/issues/11182

preserve bbbWebAPI and sharedSecret over upgrades

Set safe default values for slide position (WIP)