[DNM] [Prototype] GitHub Action with Multiple Configurations using CommonClass

[mlajkim]

Background

The current GItHubActionInstanceProvider does not allow multiple GitHub Action environments with one Athenz ZTS Server.

What's done?

The PR enables you to create your own instance plugin on a separate class as needed with only keys defined:

package com.yahoo.athenz.instance.provider.impl;

import org.slf4j.LoggerFactory;

public class InstanceGithubActionsProviderDev extends InstanceGithubActionsProviderCommon {

    static {
        LOGGER = LoggerFactory.getLogger(InstanceGithubActionsProviderDev.class);

        // Initialize the static variables with specific values for this subclass
        GITHUB_ACTIONS_PROP_PROVIDER_DNS_SUFFIX  = "athenz.zts.github_actions.dev.provider_dns_suffix";
        GITHUB_ACTIONS_PROP_BOOT_TIME_OFFSET     = "athenz.zts.github_actions.dev.boot_time_offset";
        GITHUB_ACTIONS_PROP_CERT_EXPIRY_TIME     = "athenz.zts.github_actions.dev.cert_expiry_time";
        GITHUB_ACTIONS_PROP_ENTERPRISE           = "athenz.zts.github_actions.dev.enterprise";
        GITHUB_ACTIONS_PROP_AUDIENCE             = "athenz.zts.github_actions.dev.audience";
        GITHUB_ACTIONS_PROP_ISSUER               = "athenz.zts.github_actions.dev.issuer";
        GITHUB_ACTIONS_PROP_JWKS_URI             = "athenz.zts.github_actions.dev.jwks_uri";
    }
}

This way we can create multiple classes with multiple configurations as the following in zts.properties, without duplicated logic code:

# Configuration for InstanceGithubActionsProvider
athenz.zts.github_actions.jwks_uri=https://git.internal.com/_services/token/.well-known/jwks
athenz.zts.github_actions.provider_dns_suffix=git.internal.com
athenz.zts.github_actions.issuer=https://git.internal.com/_services/token
athenz.zts.github_actions.enterprise=internal-corp-inc
athenz.zts.github_actions.audience=https://git.internal.com/
athenz.zts.github_actions.cert_expiry_time=43200

# Configuration for InstanceGithubActionsDevProvider
athenz.zts.github_actions.dev.jwks_uri=https://git-dev.linecorp.com/_services/token/.well-known/jwks
athenz.zts.github_actions.dev.provider_dns_suffix=git-dev.internal.com
athenz.zts.github_actions.dev.issuer=https://git-dev.internal.com/_services/token
athenz.zts.github_actions.dev.enterprise=internal-corp
athenz.zts.github_actions.dev.audience=https://git-dev.internal.com/
athenz.zts.github_actions.dev.cert_expiry_time=43200

[mlajkim]

Closed as #2992 has been selected as a solution for the multiple configurations (environments) feature