Accept the requested groups list as a set

Signed-off-by: Aurélien Bompard <[email protected]>

NEWS

@@ -12,6 +12,7 @@ NEWS
 Bugfixes:
 
 * Membership of the "signed_fpca" group was not always requested.
+* Handle the requested group list being passed as a set (wink wink Pagure).
 
 
 ------

flask_fas_openid.py

@@ -265,6 +265,10 @@ def login(self, username=None, password=None, return_url=None,
 
         if isinstance(groups, six.string_types):
             groups = [groups]
+        # Some applications pass the group list as a set. Convert to a list in
+        # case we need to append to it (see below).
+        if isinstance(groups, set):
+            groups = list(groups)
         # In the new AAA system, we know a user has signed the FPCA by looking
         # a group membership. We must therefore always request the
         # corresponding group.