Fix InvalidJobNameError in marathon_services_running_here

[EvanKrall]

configure_nerve built against newer paasta_tools was getting an error:

Traceback (most recent call last):
  File "/usr/bin/configure_nerve", line 9, in <module>
    load_entry_point('nerve-tools==0.8.27', 'console_scripts', 'configure_nerve')()
  File "/usr/share/python/nerve-tools/lib/python2.7/site-packages/nerve_tools/configure_nerve.py", line 195, in main
    new_config = generate_configuration(get_services_running_here_for_nerve(), opts.heartbeat_path)
  File "/usr/share/python/nerve-tools/lib/python2.7/site-packages/paasta_tools/marathon_tools.py", line 743, in get_services_running_here_for_nerve
    return get_marathon_services_running_here_for_nerve(cluster, soa_dir) + \
  File "/usr/share/python/nerve-tools/lib/python2.7/site-packages/paasta_tools/marathon_tools.py", line 673, in get_marathon_services_running_here_for_nerve
    marathon_services = marathon_services_running_here()
  File "/usr/share/python/nerve-tools/lib/python2.7/site-packages/paasta_tools/marathon_tools.py", line 656, in marathon_services_running_here
    (srv_name, srv_instance, _, __) = deformat_job_id(executor['id'])
  File "/usr/share/python/nerve-tools/lib/python2.7/site-packages/paasta_tools/marathon_tools.py", line 577, in deformat_job_id
    return decompose_job_id(job_id)
  File "/usr/share/python/nerve-tools/lib/python2.7/site-packages/paasta_tools/utils.py", line 723, in decompose_job_id
    raise InvalidJobNameError('invalid job id %s' % job_id)
paasta_tools.utils.InvalidJobNameError: invalid job id example_service.mesosstage_main.gitfb0c7ac5.configa27f4485.25d25b29-9df1-11e5-a639-2a9e4587c827

This should fix that, once we push this and bump the version of paasta_tools that nerve-tools deps.

[solarkennedy]

What do you think about reusing the when_there_are_num_which_tasks function?

[EvanKrall]

It seemed too complicated. Also can you share steps between features like that?

[solarkennedy]

ship

[EvanKrall]

I think I may have forgotten to bump the python package version number (edit: that's an issue on nerve-tools)