ci: add integration check for expirationd module This patch extends the 'integration.yml' workflow and adds a new workflow call for running tests to verify integration between tarantool and the expiration module. Part of #5265 Part of #6056 Closes #6528 (cherry picked from commit 1ac382f2505a379cd34516c9744fc330a7dfeeb8)

test: fix flaky wal_off/snapshot_stress test This commit fixes the following failure: ``` [028] --- wal_off/snapshot_stress.result Fri Jun 5 06:49:36 2020 [028] +++ wal_off/snapshot_stress.reject Fri Oct 16 13:48:23 2020 [028] @@ -375,7 +375,7 @@ [028] ... [028] snaps_find_status; [028] --- [028] -- snaps found [028] +- where are my snapshots? [028] ... [028] snapshot_check_failed = false [028] while #snaps > initial_snap_count do [028] ``` It happens, because the fiber making snapshots is started after worker fibers and it works until all worker fibers are done so it might occur that it doesn't make any snapshots. Fix this by replacing the while-loop with a repeat-loop, thus ensuring that the worker fiber makes at least one snapshot. Closes #5431 (cherry picked from commit e0e6fe106d11855631a2673dbc72a670378669aa)

ci: add integration check for tarantool-php/queue This patch extends the 'integration.yml' workflow and adds a new workflow call for running tests to verify integration between tarantool and the tarantool-php/queue connector. Part of #5265 Part of #6056 Closes #6595 (cherry picked from commit 5bcb0dcf9bbed06ac0c2a0998a1aa5f505cd814a)

debian: fix checks license This patch checks out to up-to-date tarantool/checks master branch with checking out to up-to-date tarantool/test-run master branch. Two commits have been added to tarantool/checks. The first one is related to submodule CI: tarantool/checks#27, the second one contains license authors fix: tarantool/checks#28. (cherry-picked from commit f662140)

debian: actualize licenses Add missing third party licenses to debian/copyright. Update copyright dates for modules. Remove license entries for unused modules. Closes #6391 (backported from commit 5a8fea5)