update the xblock versions for drag and drop v2, polls and problem builder (#1278)
update the xblock versions for drag and drop v2, polls and problem builder (#1278)

* update the xblock versions for drag and drop v2, polls and problem builder

* added v with release tag for problem builder xblock

edx-solutions/edx-platform,edx-solutions/edx-platform,edx-solutions/edx-platform,edx-solutions/edx-platform