refactors update action to change commit_params with the correct path

Gemfile.lock

@@ -274,7 +274,7 @@ GEM
       diff-lcs (~> 1.1)
       mime-types (>= 1.16, < 3)
       posix-spawn (~> 0.3)
-    gitlab_git (10.2.3)
+    gitlab_git (10.3.0)
       activesupport (~> 4.0)
       charlock_holmes (~> 0.7.3)
       github-linguist (~> 4.7.0)

app/controllers/concerns/creates_commit.rb

@@ -8,7 +8,6 @@ module CreatesCommit
       source_project: @project,
       source_branch: @ref,
       target_branch: @target_branch,
-      file_path: @file_path,
       previous_path: @previous_path
     )
 

app/controllers/projects/blob_controller.rb

@@ -39,16 +39,17 @@ class Projects::BlobController < Projects::ApplicationController
 
   def update
     unless params[:file_name].empty?
-      @previous_path = @file_path
-      @file_path = params[:file_name]
+      @previous_path = @path
+      @path = params[:file_name]
+      @commit_params[:file_path] = @path
     end
 
     after_edit_path =
       if from_merge_request && @target_branch == @ref
         diffs_namespace_project_merge_request_path(from_merge_request.target_project.namespace, from_merge_request.target_project, from_merge_request) +
-          "#file-path-#{hexdigest(@file_path)}"
+          "#file-path-#{hexdigest(@path)}"
       else
-        namespace_project_blob_path(@project.namespace, @project, File.join(@target_branch, @file_path))
+        namespace_project_blob_path(@project.namespace, @project, File.join(@target_branch, @path))
       end
 
     create_commit(Files::UpdateService, success_path: after_edit_path,