* Test added to check support for import of messages sent to your own DM
channel
* Support for single member direct channel messages and posts
Now bulk import is able to export/import the self direct channel and
the posts inside
* Improve how the copy of channel members for DM and DM posts
* Improved the tests for the export self-channels
* Consistent license message for all the go files
* Fixing the last set of unconsistencies with the license headers
* Addressing PR review comments
* Fixing busy.go and busy_test.go license header
* Migrating audit store
* Final migration example for the audit store
* async example
* Ending migration
* Removing Async helper
* Fixing tests
* Fixing govet problems with the StoreResult instanstiation
* transplant the existing PR into the working tree
* start addressing review comments
* move existing direct channel export code into this branch
* modify channel exporter to use squirell and populate members in two steps
* use squirrel to build sql queries for channel and dm/gm export methods
* remove debug helpers and use Username instead of UserId
* unit test for DM Channel exporter
* add more unit tests for channel export
* add test for DM/GM post export
* checkpoint with failing test for postgres
* use getQueryBuilder to make sure squirrel uses the correct formatting
for each database
* add a test for post export
* fix shadowed vars that broke the build
* address review comments and add tests to support it
* address review comments and add a mlog call
* s/Info/Debug/
* address review comments in post_store
* address review comments in channel_store
* address review comments in export
* address review comment in post_store: drop GroupBy
* address review comment on supplier: move getQueryBuilder to sqlstore
* address review comments: explicit TearDown
* address review comments: improve test coverage
* address review comments: make sure public and private channels are excluded
* address review comments: improve test coverage
* address review comments: make sure Channels table gets truncated after
each test
* more cleanups and better assertions
* wrap PostStore in a StoreTestWithSqlSupplier
* last minute changes: improve post export test coverage and check members
* address review comments: make sure all posts have their channel
members set
* address review comments: make sure all posts have their ChannelMembers
exported correctly
* gofmt fix
* sort channels so it's possible to assert on index
* [MM-12667] Allow including deactivated users in bulk import and export
1. Added `deleteAt` for user type import line
2. Adding deactivated users data in bulk export
3. Importing deactivated users data in bulk import
Added/Updated relevant test cases
* Fixed export of replies to posts by deleted users.
Updated tests for same
* First version of the preference exporter
* First working version of the preference export
* Removed useless debug line
* Added special case of empty string to harverst the omitempty feature
* Removed dangling line from rebase
* Moved exportablepreference in scope
* Fix go vet issue
* Fix formating
* Add simple test
* Add full test for BulkExportUsers
* Improve variable naming
* Added capability to export reactions of posts
* Added capability to export reactions of replies of a post
* Added test case to test the reactions of a post
* MM-11781: Basic Data Export Command Line.
* ChannelStore new unit tests.
* TeamStore new unit tests.
* Unit test for new UserStore function.
* Unit tests for post store new methods.
* Review fixes.
* Fix duplicate command name.
