GradleBuildWriter does not support writing repository with credentials

[tgeens]

To provide access to Alfresco enterprise repositories, we should add https://artifacts.alfresco.com/nexus/content/groups/private (with authentication placeholders?) in the gradle build.

The upstream GradleBuildWriter only supports repositories as a single string and the method is final

We would very much like to use a syntax like this:

maven {
       url 'https://artifacts.alfresco.com/nexus/content/groups/private'
       credentials {
                username property("com.alfresco.artifacts.nexus.username")
                password property("com.alfresco.artifacts.nexus.password")
        }
}