* MM-26883/26884: properly identify interface name for test services
We were just hardcoding to dockerhost which would only work inside
a CI environment. This PR generalizes the logic to use fallbacks
if dockerhost is not available.
* Incorporate review comments
* 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
* Refactor more code to use testutils.WasCalled
* incorporate review comments
* Revert watcher_test.go changes
The file is in config package and the other tests use config_test.
So it is not visible.
* Convert config/watcher_test.go t.Fatal calls into require calls
* Moved wasCalled to a public helper function
Now the testutils package has a new function WasCalled
that can be used by anywhere.
* Move OpenGraph code into its own file
* Move OpenGraph image proxying to app layer
* Move test file code out of api4 package
* MM-11272 Add OpenGraph and image dimension metadata to posts
