Rename epics state column to state_id
Rename state
column to state_id
in epics
table.
Epics table have an integer column called state
. We are changing issues and merge requests table to also have an integer column called state_id
. To be consistent we should have all columns named as state_id
For more context check: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/25107#note_155152188