Please add a simple groovy that shows how to delete a DBB collection

[RegiBrazil]

It may sound easy for experts, but customers might need to delete "old left" collections at DBB repo.
@drbruce-github showed a nice simple example at
https://ibm-systems-z.slack.com/archives/C2TBPA725/p1587140011114100?thread_ts=1586352800.067200&cid=C2TBPA725
Here for people that do not have slack:
``//Delete a collection XXX
//repositoryClient.deleteCollection("XXX")
@groovy.transform.BaseScript com.ibm.dbb.groovy.ScriptLoader baseScript
import com.ibm.dbb.build.*
import com.ibm.dbb.repository.*
//Set up repository client
BuildProperties properties = BuildProperties.getInstance()
properties.load(new File("${getScriptDir()}/user.properties"))
if(!properties.url||!properties.username){
println("You must update the user.properties file first")
System.exit(0)
}
def client = new RepositoryClient()
client.setUrl(properties.url)
client.setUserId(properties.username)
if(properties.password!=null){
client.setPassword(properties.password)
}else if(properties.passwordFile!=null){
client.setPasswordFile(new File(properties.passwordFile))
}else{
println("Please enter either a password or the path for a password file in user.properties")
System.exit(0)
}
client.setForceSSLTrusted(true)
//Delete a collection XXX
client.deleteCollection("XXX")
println("XXX is deleted")