* TestGetLicenseFileFromDisk: avoid using fileutils.FindConfigFile
* config: abstract config-related file access, extend memory store
* simplify config validate to avoid file knowledge
* fix relative file tests
* cluster: fix ConfigChanged event
The old and new configurations were swapped when notifying the enterprise code of configuration changes, creating needless instability in propagating config updates across a cluster.
* config/database: ignore duplicates
* test cleanup
* remove unnecessary Save() in test
* MM-14145: The config store Set will now Save automatically
When UpdateConfig (and configStore.Set) is called in admin.go and
config.go, commonStore.Set now takes a store-specific persist function.
It uses that persist function to save the configuration automatically.
Removed: Now callers do not have to call configStore.Save or
app.PersistConfig, and those functions have been removed.
Possible downside: this means a "failed to persist config" error can now
be thrown during a app.UpdateConfig or commonStore.Set call. But
considering application code never really sets a config without saving
it (except in the test cases, which were testing that -- see below), it
seems fine to group these responsibilities.
Also removed: tests for 'set without save'. Since that can not happen
anymore, the tests are not needed.
* Removed Save completely, cleaned up formatting, joined save test with
set tests.
* fixed shadowed variable error
* vendor github.com/jmoiron/sqlx
* MM-11262: introduce a database store
* revert unnecessary fmt.Errorf
* simplify unit test helper methods
* remote TODO re: retry
* relocate initializeConfigurationsTable for clarity
* factor out a commonStore
* acquire database config lock on close for safety
* add missing header
* fix lock comment
