Add boolean field for content_default_http_proxy in HTTProxy entity (SatelliteQE#1254)

* Add boolean field for content_default_http_proxy in HTTProxy entity

Signed-off-by: Gaurav Talreja <gtalreja@redhat.com>

* Ignore content_default_http_proxy param for SAT-30769

Signed-off-by: Gaurav Talreja <gtalreja@redhat.com>

---------

Signed-off-by: Gaurav Talreja <gtalreja@redhat.com>

Author: Gauravtalreja1

nailgun/entities.py

@@ -5553,6 +5553,7 @@ def __init__(self, server_config=None, **kwargs):
             'organization': entity_fields.OneToManyField(Organization),
             'location': entity_fields.OneToManyField(Location),
             'cacert': entity_fields.StringField(),
+            'content_default_http_proxy': entity_fields.BooleanField(),
         }
         self._meta = {'api_path': 'api/v2/http_proxies'}
         super().__init__(server_config=server_config, **kwargs)
@@ -5575,12 +5576,17 @@ def read(self, entity=None, attrs=None, ignore=None, params=None):
         For more information, see `Bugzilla #1779642
         <https://bugzilla.redhat.com/show_bug.cgi?id=1779642>`_.
         """
+        if attrs is None:
+            attrs = self.read_json()
         if ignore is None:
             ignore = set()
         ignore.add('password')
         ignore.add('organization')
         ignore.add('location')
         ignore.add('cacert')
+        # Workaround for SAT-30769
+        if 'content_default_http_proxy' not in attrs:
+            ignore.add('content_default_http_proxy')
         return super().read(entity, attrs, ignore, params)