Close socket during initialization

[vickenty]

What does this PR do?

Make sure statsd uses socket settings configured in initialize.

Description of the Change

If the global statsd instance is used before initialize() is called (for example, statsd used to send metrics from a top-level of a loaded module), statsd instance will already have a socket open when we set connection parameters. To make sure they take effect, call close_socket().

Alternate Designs

Possible Drawbacks

Verification Process

Additional Notes

Release Notes

Review checklist (to be filled by reviewers)

• Feature or bug fix MUST have appropriate tests (unit, integration, etc...)
• PR title must be written as a CHANGELOG entry (see why)
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