8.0 Release won't start without RabbitMQ dependencies, even using ZMQ

[acedrew]

Description of Issue

A fresh install of 8.0 will not start without installing the RabbitMQ Server and all of it's dependencies

Affected Version

8.0

Screenshots

Expected

Actual

Fails with assertion error that the rabbitmq server directory does not exist

Steps to Reproduce

Additional Details

[shwethanidd]

@acedrew: working on it now.

[jhaack]

Stacktrack:
2021-02-04 09:12:19,543 () volttron.platform.main ERROR: Missing rabbitmq server directory/home/jer/rabbitmq_server/rabbitmq_server-3.7.7/
Traceback (most recent call last):
File "/home/jer/git/vdev/volttron/platform/main.py", line 1094, in start_volttron_process
health_service = HealthService(address=address,
File "/home/jer/git/vdev/volttron/platform/vip/healthservice.py", line 63, in init
self._rmq_config = RMQConfig()
File "/home/jer/git/vdev/volttron/utils/rmq_config_params.py", line 94, in init
assert os.path.isdir(self.rabbitmq_server), "Missing rabbitmq server directory{}".format(self.rabbitmq_server)
AssertionError: Missing rabbitmq server directory/home/jer/rabbitmq_server/rabbitmq_server-3.7.7/
2021-02-04 09:12:19,545 () volttron.platform.main ERROR: None

[jhaack]

Creating the following directory fixes the problem:
/home/jer/rabbitmq_server/rabbitmq_server-3.7.7/

The check for this directory needs to be removed for ZMQ installs. Tests need to be adjusted to catch this error.

[jhaack]

Thank you, @acedrew. The release has been pulled back and will be republished after additional tests are in place.

[shwethanidd]

@acedrew Please test releases/8.x branch and close the issue