add students_url to get nav api

app/controllers/ec_major_schools_controller.rb

@@ -122,6 +122,7 @@ class EcMajorSchoolsController < ApplicationController
                      requirement_vs_objective_url: "#{requirement_vs_objective_ec_major_school_ec_year_path(@year, :ec_major_school_id => @year.ec_major_school_id)}",
                      requirement_vs_standard: "#{requirement_vs_standard_ec_major_school_ec_year_path(@year, :ec_major_school_id => @year.ec_major_school_id)}",
                      requirement_vs_courses: "#{requirement_vs_courses_ec_major_school_ec_year_path(@year, :ec_major_school_id => @year.ec_major_school_id)}",
+                     students_url: student_lists_ec_major_schools_ec_years_path(@year, ec_major_school_id: @year.ec_major_school_id),
                      go_back_url: ec_major_school_path(major),
                      ec_course_support_setting_url: ec_course_support_setting_url,
                      ec_course_reach_setting_url: ec_course_reach_setting_url,