Rolls out security navbar to more users

Rolls out the security navbar discovery feature to users created
2019-11-01 and onwards

ee/app/helpers/ee/groups_helper.rb

@@ -83,7 +83,7 @@ module EE
     end
 
     def show_discover_group_security?(group)
-      security_feature_available_at = DateTime.new(2020, 1, 20)
+      security_feature_available_at = DateTime.new(2019, 11, 1)
 
       !!current_user &&
         ::Gitlab.com? &&

ee/app/helpers/ee/projects_helper.rb

@@ -265,7 +265,7 @@ module EE
     end
 
     def show_discover_project_security?(project)
-      security_feature_available_at = DateTime.new(2020, 1, 20)
+      security_feature_available_at = DateTime.new(2019, 11, 1)
 
       !!current_user &&
         ::Gitlab.com? &&

ee/spec/helpers/ee/groups_helper_spec.rb

@@ -115,7 +115,7 @@ describe GroupsHelper do
         allow(group).to receive(:feature_available?) { security_dashboard_feature_available? }
         allow(helper).to receive(:can?) { can_admin_group? }
 
-        expected_value = user? && created_at > DateTime.new(2020, 1, 20) && gitlab_com? &&
+        expected_value = user? && created_at > DateTime.new(2019, 11, 1) && gitlab_com? &&
                          ab_feature_enabled? && !security_dashboard_feature_available? && can_admin_group?
 
         expect(helper.show_discover_group_security?(group)).to eq(expected_value)

ee/spec/helpers/projects_helper_spec.rb

@@ -186,7 +186,7 @@ describe ProjectsHelper do
         allow(project).to receive(:feature_available?) { security_dashboard_feature_available? }
         allow(helper).to receive(:can?) { can_admin_namespace? }
 
-        expected_value = user? && created_at > DateTime.new(2020, 1, 20) && gitlab_com? &&
+        expected_value = user? && created_at > DateTime.new(2019, 11, 1) && gitlab_com? &&
                          ab_feature_enabled? && !security_dashboard_feature_available? && can_admin_namespace?
 
         expect(helper.show_discover_project_security?(project)).to eq(expected_value)