* PLT-7302: Aggregate Elasticsearch indexes over a certain age.
This is done by a scheduled daily job, in order to keep the shard count
to a sensible level in Elasticsearch.
* Use map[string]string instead of StringMap
This commit redesigns the jobserver to be based around an architecture
of "workers", which carry out jobs of a particular type, and "jobs"
which are a unit of work carried by a particular worker. It also
introduces "schedulers" which are responsible for scheduling jobs of a
particular type automatically (jobs can also be scheduled manually when
apropriate).
Workers may be run many times, either in instances of the platform
binary, or the standalone jobserver binary. In any mattermost cluster,
only one instance of platform OR jobserver must run the schedulers. At
the moment this is controlled by a config variable, but in future will
be controlled through the cluster leader election process.
* Added initial job server
* Added job server to be ran as part of platform
* Added test job to the enterprise repo
* Fixed job server not loading license
* Renamed job package to jobs
* Fixed TE not being buildable
* Added JobStatus table to database
* Changed fields used by JobStatus
* Added APIs to query job status
* Added config change listener to server
* Added option to run job server from Makefile
* Added ability to enable/disable jobs from config
* Commented out placeholder for search indexing job
* Fixed govet
* Removed debug messages and fixed job api init message
* Adding initial race detector
* Remove setting of config twice
* Fixing config file watch and config reload on license save
* Fixing config file watch and config reload on license save
* Fixing build error
* Fixing locking issue
* Fixing makefile
* Fixing race in config
* Fixing race in status unit test
* Adding EE race tests
* Fixing race in cluster info
* Removing code that's isn't needed
* Fixing some more races
* Fixing govet issue
* Adding go vet to the api package
* Adding go vet to app package
* Adding go vet to manualtesting package
* Adding go vet to the model package
* Adding go vet to the store dir
* Adding go vet to utils package
* Adding missing dirs with go files
* Fixing up makefile
* Fixing up makefile
* Removing root dir
