fix a few isolated dev issues

the main goal of this change is to make `make docker-isolated` work out
of the box

- specify the proper version for awx-expect --version
- update some deprecated playbook bits
- change the isolated container to privileged so bwrap will work
- fix awx-manage test_isolated_connection
- expedite the first isolated heartbeat so you don't have to wait 10m;
  this is accomplished by _not_ setting Instance.last_isolated_check to
  now() at insertion time (which causes the next check not to happen for
  10 minutes)
- fix a bug that caused isolated node execution to fail when bwrap was
  enabled

see: https://github.com/ansible/tower/issues/2150

This reverts commit 9863fe71dc.

awx/main/expect/isolated_manager.py

@@ -434,6 +434,7 @@ class IsolatedManager(object):
                 task_result = {}
             if 'capacity_cpu' in task_result and 'capacity_mem' in task_result:
                 cls.update_capacity(instance, task_result, awx_application_version)
+                logger.debug('Isolated instance {} successful heartbeat'.format(instance.hostname))
             elif instance.capacity == 0:
                 logger.debug('Isolated instance {} previously marked as lost, could not re-join.'.format(
                     instance.hostname))