Updating the GroupRequiredMixin in views

I exchanged the `GroupRequiredMixin` by `IsProviderMixin` in every
relevant views.
Signed-off-by: Matthieu Berjon <matthieu.berjon@inria.fr>

django/allgo/main/views.py

@@ -60,7 +60,7 @@ from .forms import (
 # Local imports
 import config
 from .helpers import get_base_url, get_ssh_data, upload_data, notify_controller
-from .mixins import GroupRequiredMixin
+from .mixins import IsProviderMixin
 from .models import (
     AllgoUser,
     DockerOs,
@@ -210,7 +210,7 @@ class WebappUpdate(SuccessMessageMixin, LoginRequiredMixin, UpdateView):
             return super(WebappUpdate, self).form_invalid(form)
 
 
-class WebappCreate(SuccessMessageMixin, LoginRequiredMixin, GroupRequiredMixin, CreateView):
+class WebappCreate(SuccessMessageMixin, LoginRequiredMixin, IsProviderMixin, CreateView):
     """Create a new webapp
 
     Attributes:
@@ -225,7 +225,7 @@ class WebappCreate(SuccessMessageMixin, LoginRequiredMixin, GroupRequiredMixin,
     form_class = WebappForm
     success_message = 'Webapp created successfully.'
     template_name = 'webapp_add.html'
-    group_required = ['inria', ]
+    #  group_required = ['inria', ]
 
     def get_success_url(self):
         """If successful redirect to the webapp list page"""
@@ -974,7 +974,7 @@ class RunnerList(LoginRequiredMixin, ListView):
         return super().get_context_data(**kwargs)
 
 
-class RunnerCreate(SuccessMessageMixin, LoginRequiredMixin, GroupRequiredMixin, CreateView):
+class RunnerCreate(SuccessMessageMixin, LoginRequiredMixin, IsProviderMixin, CreateView):
     """Create a runner and save it into the database
 
     Attributes:
@@ -990,7 +990,6 @@ class RunnerCreate(SuccessMessageMixin, LoginRequiredMixin, GroupRequiredMixin,
     error_message = 'You don\'t have sufficient privileges to create an open bar runner.'
     success_url = reverse_lazy('main:runner_list')
     template_name = 'runner_add_update.html'
-    group_required = ['inria', ]
 
     def form_valid(self, form):
         """ Validate some fields before saving them."""