Provide a static method to enable metrics with custom name, maxConnections in ConnectionProvider

[tuguri8]

Motivation

• I found that metrics option has been added for ConnectionProvider since 0.9.5. (Add API ConnectionProvider.metrics #925)
• To enable ConnectionProvider metrics with custom name and maxConnections now, I have to use builder and customize other options so It can make unnecessary boilerplate.
• There are many use cases that enable only ConnectionProvider metrics with custom name, maxConnections.. so how about make new static method with name, maxConnections, metrics parameters?
  -> These can help reducing boilerplate :)

Desired solution

• provide another create method with name, maxConnections, metrics parameters in ConnectionProvider

static ConnectionProvider create(String name, int maxConnections, boolean metrics) {
		return builder(name).maxConnections(maxConnections)
		                    .pendingAcquireTimeout(Duration.ofMillis(DEFAULT_POOL_ACQUIRE_TIMEOUT))
		                    .metrics(metrics)
		                    .build();
}

Considered alternatives

Additional context

• If you like my idea at all, I will provide a PR. thx.

[violetagg]

@tuguri8 It will be nice if you provide a PR. Thanks!