[qa] RabbitMQ automated tests should be updated

Fixes were merged:

https://review.gerrithub.io/275968
https://review.gerrithub.io/#/c/275970/

Let's wait for the next test run to verify that fixes work fine.

Tests failed again with another issue:

https://mirantis.testrail.com/index.php?/runs/view/10516&group_by=cases:section_id&group_order=asc&group_id=23588

self = <mos_tests.environment.ssh.SSHClient object at 0x7f7715e4b910> [10.109.2.4:22]
command = 'pcs resource --wait=60 disable p_rabbitmq-server;pcs resource --wait=60 enable p_rabbitmq-server'
verbose = True

    def check_call(self, command, verbose=True):
        ret = self.execute(command, verbose)
        if ret['exit_code'] != 0:
            raise CalledProcessError(command, ret['exit_code'],
> ret['stdout'] + ret['stderr'])
E CalledProcessError: Command 'pcs resource --wait=60 disable p_rabbitmq-server;pcs resource --wait=60 enable p_rabbitmq-server' returned non-zero exit status 1
E ["Resource 'p_rabbitmq-server' is not running on any node\n", 'Error: waiting timeout\n', "Resource 'p_rabbitmq-server' is master on node node-1.test.domain.local.\n", '\n', 'Pending actions:\n', '\tAction 270: p_rabbitmq-server:2_post_notify_start_0\ton node-2.test.domain.local\n', '\tAction 269: p_rabbitmq-server:1_post_notify_start_0\ton node-3.test.domain.local\n', '\tAction 268: p_rabbitmq-server:0_post_notify_start_0\ton node-1.test.domain.local\n', '\tAction 267: p_rabbitmq-server:0_pre_notify_start_0\ton node-1.test.domain.local\n', '\tAction 129: p_rabbitmq-server:2_monitor_35000\ton node-2.test.domain.local\n', '\tAction 128: p_rabbitmq-server:2_monitor_30000\ton node-2.test.domain.local\n', '\tAction 127: p_rabbitmq-server:2_start_0\ton node-2.test.domain.local\n', '\tAction 126: p_rabbitmq-server:1_monitor_35000\ton node-3.test.domain.local\n', '\tAction 125: p_rabbitmq-server:1_monitor_30000\ton node-3.test.domain.local\n', '\tAction 124: p_rabbitmq-server:1_start_0\ton node-3.test.domain.local\n', 'Error performing operation: Timer expired\n']