Allow using YAML configuration file with run_docker

[matrixik]

This will allow using scripts like this:

#!/usr/bin/env bash

# Uncomment for debugging
# set -o xtrace

set -eo pipefail  # Exit the script if any statement returns error.

SCRIPT_DIR="$( dirname "$(readlink -f "$0")" )"

export CONTAINER_NAME="aries_issuer"
export NETWORK_NAME="aries-mediator-service_mediator-network"
export PORTS="8002 11002"
export ARG_FILE="${SCRIPT_DIR}/cfg_issuer.yml"

../aries-cloudagent-python/scripts/run_docker start

I find working with yaml files easier/faster than very, very long command line when testing and debugging (because I can simply comment out some configs and uncomment others at the same time).

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

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[swcurran]

Can someone investigate and comment on the integration test failures? Solar flares?

[ianco]

Can someone investigate and comment on the integration test failures? Solar flares?

I'm guessing some kind of environment issue, I've restarted the integration tests to be sure.

There aren't any changes in this PR that should affect any of the tests