pythonPackages.flask-restplus_0_8: move to separate file

and fix on Python 3.x

pkgs/development/python-modules/flask-restplus/0.8.nix

···
+{ lib
+, buildPythonPackage
+, fetchPypi
+, nose
+, blinker
+, tzlocal
+, mock
+, rednose
+, flask
+, six
+, jsonschema
+, pytz
+, aniso8601
+, flask-restful
+}:
+
+buildPythonPackage rec {
+  pname = "flask-restplus";
+  version = "0.8.6";
+  name = "${pname}-${version}";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "3bb76cc156b9a09da62396d82b29fa31e4f27cccf79528538fe7155cf2785593";
+  };
+
+  checkInputs = [ nose blinker tzlocal mock rednose ];
+  propagatedBuildInputs = [ flask six jsonschema pytz aniso8601 flask-restful ];
+
+  # RuntimeError: Working outside of application context.
+  doCheck = false;
+
+  checkPhase = ''
+    nosetests
+  '';
+
+  meta = {
+    homepage = "https://github.com/noirbizarre/flask-restplus";
+    description = "Fast, easy and documented API development with Flask";
+    license = lib.licenses.mit;
+  };
+}

pkgs/top-level/python-packages.nix

···
     };
   };
 
-  flask-restplus = buildPythonPackage rec {
-    name = "flask-restplus-${version}";
-    # Exactly 0.8.6 is required by flexget
-    version = "0.8.6";
-    disabled = isPy3k;
-
-    src = pkgs.fetchurl {
-      url = "mirror://pypi/f/flask-restplus/${name}.tar.gz";
-      sha256 = "3bb76cc156b9a09da62396d82b29fa31e4f27cccf79528538fe7155cf2785593";
-    };
-
-    buildInputs = with self; [ nose blinker tzlocal mock rednose ];
-    propagatedBuildInputs = with self; [ flask six jsonschema pytz aniso8601 flask-restful ];
-
-    meta = {
-      homepage = "https://github.com/noirbizarre/flask-restplus";
-      description = "Fast, easy and documented API development with Flask";
-      license = licenses.mit;
-    };
-  };
+  # Exactly 0.8.6 is required by flexget
+  flask-restplus_0_8 = callPackage ../development/python-modules/flask-restplus/0.8.nix { };
 
   flask_script = buildPythonPackage rec {
     name = "Flask-Script-${version}";