Fix test issues

[malcyon]

Fixing these issues:

Java install randomly fails due to using wrong adoptopenjdk api

• Fixed by disabling the lean_delivery.java Ansible role and letting the Elasticsearch ansible role install Java instead.

Function test_service_graylog_started() needs to run before ui tests.

• This essentially waits for Graylog to start up properly. When this randomly doesn't run first, tests fail because Graylog has not yet started.
• Fixed by combining test modules into one module.

Travis CI failing - Molecule unable to spin up VM

Error:

        "module_stderr": "",
        "module_stdout": "Retrying to acquire lock on /home/travis/.cache/molecule/graylog-ansible-role/default, waiting for 30 seconds\nRetrying to acquire lock on /home/travis/.cache/molecule/graylog-ansible-role/default, waiting for 60 seconds\nRetrying to acquire lock on /home/travis/.cache/molecule/graylog-ansible-role/default, waiting for 90 seconds\nRetrying to acquire lock on /home/travis/.cache/molecule/graylog-ansible-role/default, waiting for 120 seconds\nTimedout trying to acquire lock on /home/travis/.cache/molecule/graylog-ansible-role/default\n",
        "msg": "MODULE FAILURE\nSee stdout/stderr for the exact error",
        "rc": 3

Due to:

• https://github.com/ansible-community/molecule/issues/2895
• https://github.com/ansible-community/molecule/issues/2905
• https://github.com/ansible-community/molecule/pull/2638 Fixed by downgrading to Molecule 3.0.8