Description of problem:
A custome report is generated for the dates between From and To.
If the range is illogical, a blank search resolt is being returned, but a search still occures. The ranges here should be protected, so for example a user should be able to insert
From: Steak and Kidney Pie
To: -1000-01-01
which returns a 500 response.

Version-Release number of selected component (if applicable):
python-django-horizon-2014.1-7.el7ost.noarch

How reproducible:
Always

Steps to Reproduce:
1. go to Resources Usage > Daily Usage
2. select as range Other
3. Enter From: something silly
4. Enter To: something sillier

Actual results:
Something Went Wrong message.

Expected results:
a warning saying that ranges are not valid
ranges should be protected. a good range here might be from EPOC to 2025 and date format only.

Additional info:
2014-06-09 08:30:06,544 31597 ERROR django.request Internal Server Error: /dashboard/admin/metering/report
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/django/core/handlers/base.py", line 112, in get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/usr/lib/python2.7/site-packages/horizon/decorators.py", line 38, in dec
    return view_func(request, *args, **kwargs)
  File "/usr/lib/python2.7/site-packages/horizon/decorators.py", line 86, in dec
    return view_func(request, *args, **kwargs)
  File "/usr/lib/python2.7/site-packages/horizon/decorators.py", line 54, in dec
    return view_func(request, *args, **kwargs)
  File "/usr/lib/python2.7/site-packages/horizon/decorators.py", line 38, in dec
    return view_func(request, *args, **kwargs)
  File "/usr/lib/python2.7/site-packages/horizon/decorators.py", line 86, in dec
    return view_func(request, *args, **kwargs)
  File "/usr/lib/python2.7/site-packages/django/views/generic/base.py", line 69, in view
    return self.dispatch(request, *args, **kwargs)
  File "/usr/lib/python2.7/site-packages/django/views/generic/base.py", line 87, in dispatch
    return handler(request, *args, **kwargs)
  File "/usr/lib/python2.7/site-packages/horizon/tables/views.py", line 162, in post
    return self.get(request, *args, **kwargs)
  File "/usr/lib/python2.7/site-packages/horizon/tables/views.py", line 154, in get
    handled = self.construct_tables()
  File "/usr/lib/python2.7/site-packages/horizon/tables/views.py", line 137, in construct_tables
    tables = self.get_tables().values()
  File "/usr/share/openstack-dashboard/openstack_dashboard/wsgi/../../openstack_dashboard/dashboards/admin/metering/views.py", line 106, in get_tables
    project_data = self.load_data(self.request)
  File "/usr/share/openstack-dashboard/openstack_dashboard/wsgi/../../openstack_dashboard/dashboards/admin/metering/views.py", line 153, in load_data
    3600 * 24)
  File "/usr/share/openstack-dashboard/openstack_dashboard/wsgi/../../openstack_dashboard/dashboards/admin/metering/views.py", line 246, in query_data
    date_options)
  File "/usr/share/openstack-dashboard/openstack_dashboard/wsgi/../../openstack_dashboard/dashboards/admin/metering/views.py", line 225, in _calc_date_args
    raise ValueError("The dates haven't been "
ValueError: The dates haven't been recognized