This implementation uses a channel to pass the bulk messages. The caller
needs to write the operations to the channel, close the channel and
call the Bulk method.

- Add basic authentication to connect to Elasticsearch.
Username and password are configurable.
- Add path prefix to the HTTP API calls to Elasticsearch

The problem appears when the bulkChannel reaches the maximum size, the go-routine blocks
and no more data are consumed from the channel.
To fix the problem, make sure the bulkChannel doesn't reach the maximum size by consuming the data
before the channel is full.

The maximum bulk size is configurable (bulk_size) from the
output/<output> section.

State file

Add a `make dist` target to package the dashboards.

Set skip_cleanup to true

This implementation uses a channel to pass the bulk messages. The caller
needs to write the operations to the channel, close the channel and
call the Bulk method.

- Add basic authentication to connect to Elasticsearch.
Username and password are configurable.
- Add path prefix to the HTTP API calls to Elasticsearch

The problem appears when the bulkChannel reaches the maximum size, the go-routine blocks
and no more data are consumed from the channel.
To fix the problem, make sure the bulkChannel doesn't reach the maximum size by consuming the data
before the channel is full.

The maximum bulk size is configurable (bulk_size) from the
output/<output> section.

Glide improvements

Feature/file config

Create linter configuration and address found issues.
Also added magefile targets so it's running on the CI.

* [Chore] Replace global logger with local logger #10

* [Chore] Replace global logger with local logger #10

(cherry picked from commit 4350d4e)

# Conflicts:
#	metricbeat/module/jolokia/jmx/data.go

#10 (#45220)

* [Chore] Replace global logger with local logger #10 (#45086)