Version mismatch failure in CI tests for 7.0.0-alpha1

https://devops-ci.elastic.co/job/elastic+elasticsearch-docker+master+snapshot/164/console

08:52:15 =================================== FAILURES ===================================
08:52:15 _____ test_process_is_running_the_correct_version[docker://elasticsearch1] _____
08:52:15 
08:52:15 elasticsearch = <tests.fixtures.elasticsearch.<locals>.Elasticsearch object at 0x7f35e4429be0>
08:52:15 
08:52:15     def test_process_is_running_the_correct_version(elasticsearch):
08:52:15         version_string = version.replace('-SNAPSHOT', '')
08:52:15 >       assert elasticsearch.get_root_page()['version']['number'] == version_string
08:52:15 E       AssertionError: assert '7.0.0' == '7.0.0-alpha1'
08:52:15 E         - 7.0.0
08:52:15 E         + 7.0.0-alpha1
08:52:15 
08:52:15 tests/test_process.py:15: AssertionError
08:52:15 =============================== warnings summary ===============================

[jasontedor]

Ultimately Elasticsearch needs to remove the default of alpha1 from its build process. We will do this soon.