logging content improvements

[davidlmorton]

The Response.get_data() function wasn't giving us the whole data, but a
list of keys in the data like so:

now

DEBUG [ptero_workflow.api.v1.views]     Returning: ( { 'begins': [0],
    'color': 0,
    'colors': [0],
    'data': { u'petri_response_links': ...
    'inputs': { u'param': u'foo'},
    'method': { 'name': u'execute',
                'service': u'shell-command',
                'task': { 'name': u'C', 'type': u'method-list'}},
    'outputs': { u'param': u'foo'},
    'parent_color': None,
    'status': u'begun',
    'status_history': [ { 'status': u'begun',
                          'timestamp': '2015-01-28 01:07:18'}]},
  200)

was

DEBUG [ptero_workflow.api.v1.views]     Body: 'beginscolorcolorsdatainputsmethodoutputsparent_colorstatusstatus_history'

which is not helpful.

[coveralls]

Coverage remained the same at 4.67% when pulling 6c0693c on davidlmorton:no_response into 78d2104 on genome:master.

[coveralls]

Coverage increased (+0.02%) to 4.69% when pulling f926407 on davidlmorton:no_response into 78d2104 on genome:master.