Support deleting replicas by default on undeploy

[rjrudin]

This will happen if replicas were created via ConfigureForestReplicasCommand, but won't happen if they were configured any other way, such as via the custom forest support.

[rjrudin]

Basic code for doing this (in ml-app-deployer):

DatabaseManager mgr = new DatabaseManager(client);
List forestNames = mgr.getForestNames("failover-example-content");
ForestManager forestManager = new ForestManager(client);
for (String name : forestNames) {
if (forestManager.forestExists(name)) {
ForestStatus status = forestManager.getForestStatus(name);
if (status.isPrimary() && status.hasReplicas()) {
System.out.println("Delete: " + name);
forestManager.deleteReplicas(name);
}
}
}

[rjrudin]

And a Gradle task as an immediate hack if needed:

task deleteReplicas(type: com.marklogic.gradle.task.MarkLogicTask) {
doLast {
def forestManager = new com.marklogic.mgmt.forests.ForestManager(getManageClient());
for (String name : new com.marklogic.mgmt.databases.DatabaseManager(getManageClient()).getForestNames(mlAppConfig.getContentDatabaseName())) {
if (forestManager.forestExists(name)) {
def status = forestManager.getForestStatus(name);
if (status.isPrimary() && status.hasReplicas()) {
forestManager.deleteReplicas(name);
}
}
}
}
}

mlUndeploy.dependsOn deleteReplicas

[rjrudin]

This is resolved via marklogic/ml-app-deployer#140