Merge pull request #383 from edx-solutions/dcikatic/MCKIN-2986

MCKIN-2986 Update group project xblock version

requirements/edx/custom.txt

@@ -6,7 +6,7 @@
 -e git+https://github.com/edx-solutions/xblock-drag-and-drop.git@92ee2055a16899090a073e1df81e35d5293ad767#egg=xblock-drag-and-drop
 -e git+https://github.com/edx-solutions/xblock-drag-and-drop-v2.git@4482aa60643288943123fe589fab14a7f60cdc69#egg=xblock-drag-and-drop-v2
 -e git+https://github.com/edx-solutions/xblock-ooyala.git@ac49b30452aff0cc34cace6a34b788e100490f24#egg=xblock-ooyala
--e git+https://github.com/edx-solutions/xblock-group-project.git@c3c6b81cd1be30f674ea6641554852a330846316#egg=xblock-group-project
+-e git+https://github.com/edx-solutions/xblock-group-project.git@e51dbc60318d255c2468448174c85cdee7b313ab#egg=xblock-group-project
 -e git+https://github.com/edx-solutions/xblock-adventure.git@30894de41ee7efe7d5b6400086463d12995893f7#egg=xblock-adventure
 -e git+https://github.com/mckinseyacademy/xblock-poll.git@eeb2ba85311300291aca20a4a28cb7bf90de4728#egg=xblock-poll
 -e git+https://github.com/OfficeDev/xblock-officemix/@86238f5968a08db005717dbddc346808f1ed3716#egg=xblock_officemix-master