Removes id validation from MarathonGroup()

[daltonmatos]

This validation was preventig the use of the root group (/), both from
MarathonGroup().from_json(<data>) and MarathonClient().get_group("/")

Fixes issue #227

[daltonmatos]

There are still flake8 errors, but not related to this modification.

[solarkennedy]

Can you add a #noqa to get them to pass?

[daltonmatos]

Sure, but there are only two errors:

./marathon/models/base.py:16:9: E722 do not use bare except'
./marathon/models/base.py:71:9: E722 do not use bare except'

The fix is simple and I can add it to this PR. What do you think?

This is the fix:

diff --git a/marathon/models/base.py b/marathon/models/base.py
index ecc8030..db77076 100644
--- a/marathon/models/base.py
+++ b/marathon/models/base.py
@@ -13,7 +13,7 @@ class MarathonObject(object):
     def __eq__(self, other):
         try:
             return self.__dict__ == other.__dict__
-        except:
+        except Exception:
             return False
 
     def __hash__(self):
@@ -68,7 +68,7 @@ class MarathonResource(MarathonObject):
     def __eq__(self, other):
         try:
             return self.__dict__ == other.__dict__
-        except:
+        except Exception:
             return False
 
     def __hash__(self):

Let me know and I will push a new commit.

Thanks,

[solarkennedy]

Yes please, just fix it.

[daltonmatos]

Done. Thanks,