Configure port binding behaviour

[Madh93]

Hi,

This is a possible implementation of #31 to bind the Edge and ElasticSearch ports to a custom port using the @LocalstackDockerProperties annotation:

Changes

• Update RunCommand#withExposedPorts to pass ports like: "4567", ":4567" or "9876:4567"
• Add portEdge and portElasticSearch properties
• Add tests

Examples

Example of custom ports:

@LocalstackDockerProperties(portEdge = "45660", portElasticSearch = "45710", services = {"dynamodb"})
// public class ...

Example of random ports (alternative to the deprecated randomizePorts property):

@LocalstackDockerProperties(portEdge = ":4566", portElasticSearch = ":4571", services = {"dynamodb"})
// public class ...

Example of default ports (4566 and 4571):

@LocalstackDockerProperties(services = {"dynamodb"})
// public class ...

[whummer]

Looks great, thanks for this enhancement @Madh93 !! We'll release a new version to Maven Central shortly.. Thanks