Fix project member management

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/models/project_team.rb

@@ -102,7 +102,7 @@ class ProjectTeam
     source_team.map! do |tm|
       new_tm = tm.dup
       new_tm.id = nil
-      new_tm.project_id = target_project.id
+      new_tm.source = target_project
       new_tm
     end

app/views/projects/team_members/_form.html.haml

 %h3.page-title
   New project member(s)
-= form_for @user_project_relation, as: :team_member, url: project_team_members_path(@project), html: { class: "form-horizontal users-project-form" } do |f|
+= form_for @user_project_relation, as: :project_member, url: project_team_members_path(@project), html: { class: "form-horizontal users-project-form" } do |f|
   -if @user_project_relation.errors.any?
     .alert.alert-danger
       %ul

app/views/projects/team_members/_team_member.html.haml

@@ -4,7 +4,7 @@
     - if current_user_can_admin_project
       - unless @project.personal? && user == current_user
         .pull-left
-          = form_for(member, as: :team_member, url: project_team_member_path(@project, member.user)) do |f|
+          = form_for(member, as: :project_member, url: project_team_member_path(@project, member.user)) do |f|
             = f.select :access_level, options_for_select(ProjectMember.access_roles, member.access_level), {}, class: "medium project-access-select span2 trigger-submit"
            
         = link_to project_team_member_path(@project, user), data: { confirm: remove_from_project_team_message(@project, user)}, method: :delete, class: "btn-tiny btn btn-remove", title: 'Remove user from team' do