Backport 'Rebase' feature from EE to CEjprovazn-rebase

When a project uses fast-forward merging strategy user has
to rebase MRs to target branch before it can be merged.
Now user can do rebase in UI by clicking 'Rebase' button
instead of doing rebase locally.

This feature was already present in EE, this is only backport
of the feature to CE. Couple of changes:
* removed rebase license check
* renamed migration (changed timestamp)

Closes #40301

2 files changed, 9 insertions, 1 deletions

diff --git a/db/migrate/20171230123729_add_rebase_commit_sha_to_merge_requests.rb b/db/migrate/20171230123729_add_rebase_commit_sha_to_merge_requests.rb
new file mode 100644
index 00000000000..2ce156fa92e
--- /dev/null
+++ b/db/migrate/20171230123729_add_rebase_commit_sha_to_merge_requests.rb
@@ -0,0 +1,7 @@
+class AddRebaseCommitShaToMergeRequests < ActiveRecord::Migration
+  DOWNTIME = false
+
+  def change
+    add_column :merge_requests, :rebase_commit_sha, :string
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 778d66f16b0..740e80ccfd4 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20171229225929) do
+ActiveRecord::Schema.define(version: 20171230123729) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -1099,6 +1099,7 @@ ActiveRecord::Schema.define(version: 20171229225929) do
     t.string "merge_jid"
     t.boolean "discussion_locked"
     t.integer "latest_merge_request_diff_id"
+    t.string "rebase_commit_sha"
   end
 
   add_index "merge_requests", ["assignee_id"], name: "index_merge_requests_on_assignee_id", using: :btree