Ability to resolve naming conflicts in docker-compose

[blackandred]

Correctly handle case, when docker-compose says it cannot create containers because the name is already used - at least what we can do is retry the operation which usually works.

   ===> Starting "gateway_letsencrypt" (1 instances)...
[2020-07-11 08:27:34.483][info]: Doing a "rolling" deployment for "gateway_letsencrypt"
[2020-07-11 08:27:34.484][info]: Processing instance #1/1
[2020-07-11 08:27:34.484][info]: Suspending service discovery
[2020-07-11 08:27:34.971][info]: Scaling up to 2
Creating anarchist_project_gateway_letsencrypt_1 ... 
Creating anarchist_project_gateway_letsencrypt_2 ... 
Creating anarchist_project_gateway_proxy_gen_1
Creating anarchist_project_gateway_letsencrypt_1 ... done
Creating anarchist_project_gateway_letsencrypt_1

ERROR: for anarchist_project_gateway_letsencrypt_2  Cannot create container for service gateway_proxy_gen: Conflict. The container name "/anarchist_project_gateway_proxy_gen_1" is already in use by container "c6b73cdcb025091d31db78df79010819388bacf220bb42f9502da1393fc953fa". You have to remove (or rename) that container to be able to reuse that name.

ERROR: for gateway_letsencrypt  Cannot create container for service gateway_proxy_gen: Conflict. The container name "/anarchist_project_gateway_proxy_gen_1" is already in use by container "c6b73cdcb025091d31db78df79010819388bacf220bb42f9502da1393fc953fa". You have to remove (or rename) that container to be able to reuse that name.
Encountered errors while bringing up the project.
[2020-07-11 08:27:37.405][error]: Scaling back to declared state as error happened: Command 'bash' returned non-zero exit status 1.
anarchist_project_gateway_letsencrypt_1 is up-to-date
[2020-07-11 08:27:37.960][info]: Starting service discovery
Starting anarchist_project_gateway_1 ... done
Starting anarchist_project_gateway_proxy_gen_1 ... 
Starting anarchist_project_gateway_proxy_gen_1 ... done
Traceback (most recent call last):
  File "/project/.venv/lib/python3.6/site-packages/rkd/executor.py", line 65, in execute
    env=declaration.get_env()
  File "/project/.venv/lib/python3.6/site-packages/harbor/tasks/base.py", line 136, in execute
    return self.run(context)
  File "/project/.venv/lib/python3.6/site-packages/harbor/tasks/service.py", line 101, in run
    return strategies[strategy]()
  File "/project/.venv/lib/python3.6/site-packages/harbor/tasks/service.py", line 87, in <lambda>
    'rolling': lambda: self.deploy_rolling(service, context),
  File "/project/.venv/lib/python3.6/site-packages/harbor/tasks/service.py", line 170, in deploy_rolling
    raise e
  File "/project/.venv/lib/python3.6/site-packages/harbor/tasks/service.py", line 151, in deploy_rolling
    existing_containers = self.containers(ctx).scale_one_up(service)
  File "/project/.venv/lib/python3.6/site-packages/harbor/driver.py", line 372, in scale_one_up
    raise e
  File "/project/.venv/lib/python3.6/site-packages/harbor/driver.py", line 368, in scale_one_up
    capture=True
  File "/project/.venv/lib/python3.6/site-packages/harbor/driver.py", line 194, in compose
    return self.scope.sh(cmd, capture=capture)
  File "/project/.venv/lib/python3.6/site-packages/rkd/contract.py", line 282, in sh
    cmd=cmd, capture=capture, verbose=verbose, strict=strict, env=env
  File "/project/.venv/lib/python3.6/site-packages/rkd/taskutil.py", line 92, in sh
    return check_output('bash', shell=True, stdin=read).decode('utf-8')
  File "/usr/lib/python3.6/subprocess.py", line 356, in check_output
    **kwargs).stdout
  File "/usr/lib/python3.6/subprocess.py", line 438, in run
    output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command 'bash' returned non-zero exit status 1.
Command '#!/bin/bash -eopipefail 
set -euo pipefail; export PYTHONUNBUFFERED=1;  /project/.venv/bin/harbor --no-ui --no-ui :harbor:service:up gateway_letsencrypt  --strategy=auto' returned non-zero exit status 1.Cannot start service "gateway_letsencrypt"

Steps to reproduce:
Deploy to a fresh environment - do a docker prune on containers, networks and volumes.