Definition Elytron key-manager with key-store (which needs password) without filled credential-reference causes ugly failure-description with senseless Exception.

Steps to reproduce

• firefly.keystore which is attached copy to eap_home/standalone/data/cs.
• /subsystem=elytron/key-store=ff001:add(path=cs/firefly.keystore,relative-to=jboss.server.data.dir,type=JKS,credential-reference= {clear-text=Elytron})
  * /subsystem=elytron/key-managers=keymanager001:add(algorithm=SunX509, key-store=ff001)
  And you get this output:

  {
      "outcome" => "failed",
      "failure-description" => {
          "WFLYCTL0080: Failed services" => {"org.wildfly.security.key-managers.km002" => "org.jboss.msc.service.StartException in service org.wildfly.security.key-managers.km002: Failed to start service
      Caused by: java.lang.NullPointerException"},
          "WFLYCTL0412: Required services that are not installed:" => ["org.wildfly.security.key-managers.km002"],
          "WFLYCTL0180: Services with missing/unavailable dependencies" => undefined
      },
      "rolled-back" => true
  }
  

  
  There must be some kind of information about missing credential-reference or at least missing (wrong) password to key-store.
  
  
  
  When I add there credential-reference with pass to Key-store then operation passes
  /subsystem=elytron/key-managers=keymanager001:add(algorithm=SunX509, key-store=ff001, credential-reference={clear-text=Elytron}

  )

Suggestions to improvement
failure-description must not contain Exception or snippet stacktrace.
Please replace WFLYCTL0080 part to better message.
e.g. "credential-reference is required", "Missing password to key-store access"