Remove custom xmlns from bulk form updates
Remove custom xmlns from bulk form updates

https://docs.google.com/document/d/1t97k35y9juT7Wl_suOiWi-NYP3cpiaV4hUmZ0j2e-e4/edit#
We are not consistent in how we use these meta properties with system
forms, but this is more in line with the docstring on submit_case_blocks

dimagi/commcare-hq,dimagi/commcare-hq,dimagi/commcare-hq,dimagi/commcare-hq,dimagi/commcare-hq